[docs] Fix small external links issue

CHANGELOG.old.md

@@ -2328,7 +2328,7 @@ Here are some highlights ✨:
 
   This change removes the need to install the `@material-ui/styles` package directly.
   It prevents the duplication of `@material-ui/styles` in bundles and avoids confusion.
-  You can [learn more about the difference](https://mui.com/styles/basics/#material-ui-core-styles-vs-material-ui-styles) in the documentation.
+  You can [learn more about the difference](https://v4.mui.com/styles/basics/#material-ui-core-styles-vs-material-ui-styles) in the documentation.
 
 - ♿️ Improve the accessibility of the table and select components (#17696, #17773) @adeelibr, @eps1lon.
 - 📊 Launch a [developer survey](https://www.surveymonkey.com/r/5XHDL76) as a precursor to a major DatePicker enhancement effort.

docs/data/material/discover-more/showcase/appList.js

@@ -155,7 +155,7 @@ const appList = [
       'cost, usage and performance in one place. ' +
       '(Used for the business application, but not the marketing website.)',
     image: 'cloudhealth.jpg',
-    link: 'https://www.cloudhealthtech.com/',
+    link: 'https://cloudhealth.vmware.com/',
     similarWebVisits: 132,
     dateAdded: '2018-01-37',
   },

docs/pages/blog/2019.md

@@ -89,7 +89,8 @@ We will promote components that are in the lab to the core, migrate to styled-co
 ### Store
 
 We will increase the depth of content available with more themes and templates.
-We have recently released a Sketch design library, and are planning to support Figma, and Adobe XD too. For Framer, we have made the key components available as a [Framer package](https://packages.framer.com/package/material-ui/material-ui).
+We have recently released a Sketch design library, and are planning to support Figma, and Adobe XD too.
+For Framer, we have made the key components available as a Framer package.
 
 ### Enterprise
 

docs/pages/blog/2020.md

@@ -41,26 +41,26 @@ We have started to leverage these trends as opportunities in the next version of
 We have achieved most of what we could have hoped for.
 
 - The most important, we have welcome 3 members in the company: [Damien](/blog/spotlight-damien-tassone/), [Marija](/blog/marija-najdova-joining/), and [Danail](/blog/danail-hadjiatanasov-joining/).
-- We have made significant progress with [v5](https://mui.com/). We have made half the breaking changes planned. We have migrated our [first component](https://mui.com/components/slider/) to the new style architecture (emotion by default, adapter for styled-components, and unstyled).
+- We have made significant progress with [v5](https://mui.com/). We have made half the breaking changes planned. We have migrated our [first component](https://v4.mui.com/components/slider/) to the new style architecture (emotion by default, adapter for styled-components, and unstyled).
 - We have introduced new components (some in the core, some in the lab):
-  - [Alert](/material-ui/react-alert/)
-  - [DataGrid](/x/react-data-grid/)
-  - [DatePicker](https://mui.com/components/date-picker/)
-  - [LoadingButton](https://mui.com/components/buttons/#loading-buttons)
-  - [Timeline](/material-ui/react-timeline/)
-  - [TrapFocus](https://mui.com/components/trap-focus/)
-- We have fixed most of the issues with the [Autocomplete](/material-ui/react-autocomplete/). We have received an overwhelming interest in the component. It was impressive to see.
+  - [Alert](https://v4.mui.com/components/alert/)
+  - [DataGrid](https://v4.mui.com/components/data-grid/)
+  - [DatePicker](https://v4.mui.com/components/pickers/)
+  - [LoadingButton](https://mui.com/material-ui/react-button/#loading-button)
+  - [Timeline](https://v4.mui.com/components/timeline/)
+  - [TrapFocus](https://mui.com/base/react-trap-focus/)
+- We have fixed most of the issues with the [Autocomplete](https://v4.mui.com/components/autocomplete/). We have received an overwhelming interest in the component. It was impressive to see.
 - We have completed the work for [strict mode](https://reactjs.org/docs/strict-mode.html) support.
 - We have increased the adoption of TypeScript in the codebase. We don't plan a dedicated migration but to write new code in TypeScript, as we go.
 - We have migrated most of the tests from Enzyme to [Testing Library](https://testing-library.com/).
 - We have modernized the system, introducing an [`sx` prop](https://mui.com/system/basics/) to be used in all the core components.
 - We have added support for [Figma](/store/items/figma-react/) and [Adobe XD](/store/items/adobe-xd-react/).
-- We have released the first Enterprise component in an alpha version: [XGrid](/x/react-data-grid/#commercial-version).
+- We have released the first Enterprise component in an alpha version: [XGrid](https://v4.mui.com/components/data-grid/#commercial-version).
 
 ## Looking at 2021
 
 2020 was great, 2021 is going to be even more exciting!
-We will continue in the same direction, it's still [**day one**](https://www.sec.gov/Archives/edgar/data/1018724/000119312517120198/d373368dex991.htm). Here is a breakdown of our [roadmap](/material-ui/discover-more/roadmap/).
+We will continue in the same direction, it's still [**day one**](https://www.sec.gov/Archives/edgar/data/1018724/000119312517120198/d373368dex991.htm). Here is a breakdown of our [roadmap](https://v4.mui.com/discover-more/roadmap/).
 
 ### Branding
 
@@ -69,10 +69,10 @@ The [mui.com](https://mui.com/) marketing website will soon wear a brand new sty
 
 ### MUI X
 
-We started to deliver advanced React components in 2020 with the data grid, including a [commercial version](/x/react-data-grid/#commercial-version) and the beginning of a [date range picker](https://mui.com/components/date-range-picker/).
+We started to deliver advanced React components in 2020 with the data grid, including a [commercial version](https://v4.mui.com/components/data-grid/) and the beginning of a [date range picker](https://mui.com/x/react-date-pickers/getting-started/).
 We will double down on these existing components as long as necessary to have them find the market.
 
-By the end of 2021, we aim to have released these components as stable, implement all the [features planned](/x/react-data-grid/getting-started/#feature-comparison), and at least double the size of the team.
+By the end of 2021, we aim to have released these components as stable, implement all the [features planned](https://v4.mui.com/components/data-grid/getting-started/#feature-comparison), and at least double the size of the team.
 
 ### MUI v5
 

docs/pages/blog/material-ui-v4-is-out.md

@@ -37,11 +37,11 @@ The Material Design team at Google has made the customization of their design sy
 
 ![Demo1](/static/blog/material-ui-v4-is-out/demo1.png)
 
-<p class="blog-description"><a href="https://mui.com/components/text-fields/#customized-inputs">live demo</a></p>
+<p class="blog-description"><a href="https://v4.mui.com/components/text-fields/#customized-inputs">live demo</a></p>
 
 ![Demo2](/static/blog/material-ui-v4-is-out/demo2.png)
 
-<p class="blog-description"><a href="https://mui.com/components/tabs/#customized-tabs">live demo</a></p>
+<p class="blog-description"><a href="https://v4.mui.com/components/tabs/#customized-tabs">live demo</a></p>
 
 ![Demo3](/static/blog/material-ui-v4-is-out/demo3.png)
 

docs/pages/blog/mui-core-v5.md

@@ -105,7 +105,7 @@ const StyledDiv = styled.div`
 <p class="blog-description"><a href="https://codesandbox.io/s/elastic-yonath-uedfv?file=/src/App.js">Codesandbox</a></p>
 
 You can find it in [styled-components](https://styled-components.com/), [emotion](https://emotion.sh/docs/styled), [goober](https://goober.js.org/), [stitches](https://stitches.dev/docs/api#styled), or [linaria](https://linaria.dev/).
-While MUI is compatible with any styling solution (as long as the styles have more specificity, for example, Tailwind CSS), many developers still felt the need to learn something new: the [`makeStyles`](https://mui.com/styles/basics/#hook-api) API.
+While MUI is compatible with any styling solution (as long as the styles have more specificity, for example, Tailwind CSS), many developers still felt the need to learn something new: the [`makeStyles`](https://mui.com/system/styles/basics/#hook-api) API.
 
 2. Our React integration with JSS (`@mui/styles`) is **too slow** to unlock the next layer of customization DX we aim for.
    The static CSS generation using v4 was fast enough, even [faster](https://codesandbox.io/s/nb05w?file=/src/App.js) than emotion,
@@ -400,7 +400,7 @@ We have moved all the prop descriptions to TypeScript, so IntelliSense in your e
 
 <p class="blog-description">The popup explains what the <code>forcePopupIcon</code> prop is for.</p>
 
-These TypeScript prop descriptions are also used to generate the [API pages](https://mui.com/api/autocomplete/#props) of the documentation, so there is a single source of truth.
+These TypeScript prop descriptions are also used to generate the [API pages](https://mui.com/material-ui/api/autocomplete/#props) of the documentation, so there is a single source of truth.
 
 ### Migration from Enzyme to Testing Library
 

docs/pages/blog/september-2019-update.md

@@ -22,7 +22,7 @@ Here are the most significant improvements in September:
 
   ![Autofill](/static/blog/september-2019-update/autofill.png)
 
-- 📊 Launch a [developer survey](https://www.surveymonkey.com/r/5XHDL76) as a precursor to a major Date Picker enhancement effort. We plan a new investment batch of between 100 and 500 hours.
+- 📊 Launch a [developer survey](https://www.surveymonkey.com/) as a precursor to a major Date Picker enhancement effort. We plan a new investment batch of between 100 and 500 hours.
 
 - 📚 Change imports from `@mui/styles` to `@mui/material/styles`
 
@@ -36,7 +36,7 @@ Here are the most significant improvements in September:
 
   This change removes the need to install the `@mui/styles` package directly.
   It prevents the duplication of `@mui/styles` in bundles and avoids confusion.
-  You can [learn more about the difference](https://mui.com/styles/basics/#material-ui-core-styles-vs-material-ui-styles) in the documentation.
+  You can [learn more about the difference](https://v4.mui.com/styles/basics/#material-ui-core-styles-vs-material-ui-styles) in the documentation.
 
 But this summary is just scratching the surface. We have accepted 199 commits from 61 different contributors. We have changed 1,219 files with 18,223 additions and 11,957 deletions.
 

packages/mui-styles/README.md

@@ -16,4 +16,4 @@ yarn add @mui/styles
 
 ## Documentation
 
-[The documentation](https://mui.com/styles/basics/)
+[The documentation](https://mui.com/system/styles/basics/)

packages/mui-styles/package.json

@@ -20,7 +20,7 @@
   "bugs": {
     "url": "https://github.com/mui/material-ui/issues"
   },
-  "homepage": "https://mui.com/styles/basics/",
+  "homepage": "https://mui.com/system/styles/basics/",
   "funding": {
     "type": "opencollective",
     "url": "https://opencollective.com/mui"