Remove experimental from content collections! (#2354)

* edit: remove experimental from content collections!

* edit: update "since" to 2.0.0

src/pages/en/guides/content-collections.mdx

@@ -1,6 +1,6 @@
 ---
 layout: ~/layouts/MainLayout.astro
-title: Content Collections (Experimental)
+title: Content Collections
 description: >-
   Content collections help organize your Markdown and type-check your
   frontmatter with schemas.
@@ -13,7 +13,7 @@ import TypeScriptSettingTabs from '~/components/tabs/TypeScriptSettingTabs.astro
 
 
 <p>
-  <Since v="1.7.0" />
+  <Since v="2.0.0" />
 </p>
 
 Content collections help organize your Markdown or MDX and type-check your frontmatter with schemas. Collections may be helpful if you:
@@ -25,19 +25,6 @@ Content collections help organize your Markdown or MDX and type-check your front
 
 First, run the [`astro dev`](/en/reference/cli-reference/#astro-dev), [`astro build`](/en/reference/cli-reference/#astro-build), or [`astro sync`](/en/reference/cli-reference/#astro-sync) commands to generate types. This will make the `astro:content` module available for [querying](#querying-content-collections) and [configuring](#configuring-collections) your content collections.
 
-Content Collections are experimental. To enable this feature, set the `experimental.contentCollections` flag in your Astro config:
-
-```js
-// astro.config.mjs
-import { defineConfig } from 'astro';
-
-export default defineConfig({
-  experimental: {
-    contentCollections: true,
-  },
-});
-```
-
 ### Update TypeScript configuration
 
 To benefit from the full TypeScript and autocompletion features of [using schemas with your collections](#defining-a-collection-schema), you may also need to update `tsconfig.json`. Follow the instructions below based on your Astro project's current [TypeScript configuration](/en/guides/typescript/#setup). 

src/pages/en/reference/api-reference.mdx

@@ -702,10 +702,10 @@ Pagination will pass a `page` prop to every rendered page that represents a sing
 | `page.url.prev`    | `string \| undefined` | Get the URL of the previous page (will be `undefined` if on page 1).                                                              |
 | `page.url.next`    | `string \| undefined` | Get the URL of the next page (will be `undefined` if no more pages).                                                              |
 
-## Content Collections (Experimental)
+## Content Collections
 
 <p>
-  <Since v="1.7.0" />
+  <Since v="2.0.0" />
 </p>
 
 Content collections offer APIs to configure and query your Markdown or MDX documents in `src/content/`. For features and usage examples, [see our content collections guide](/en/guides/content-collections/).

src/pages/en/reference/cli-reference.mdx

@@ -116,14 +116,14 @@ This command only checks types within `.astro` files.
 ## `astro sync`
 
 <p>
-  <Since v="1.7.0" />
+  <Since v="2.0.0" />
 </p>
 
 :::tip
 Running `astro dev` or `astro build` will run the `sync` command as well.
 :::
 
-Generates TypeScript types for all Astro modules. This sets up a [`src/env.d.ts` file](/en/guides/typescript/#setup) for type inferencing, and defines the `astro:content` module for the (experimental) [Content Collections API](/en/guides/content-collections/).
+Generates TypeScript types for all Astro modules. This sets up a [`src/env.d.ts` file](/en/guides/typescript/#setup) for type inferencing, and defines the `astro:content` module for the [Content Collections API](/en/guides/content-collections/).
 
 ## `astro add`