Release v4.9.2 · mui/material-ui

Big thanks to the 24 contributors who made this release possible.

[AppBar] Add color transparent support (#19393) @lexskir
[Divider] Fix height for vertical divider in a flexbox (#19614) @captain-yossarian
[Modal] Fix zoom out on iOS (#19548) @TommyJackson85
[MobileStepper] Fix TypeScript props not aligning with prop-types (#19594) @illusionalsagacity
[Tabs] Add missing updateScrollButtons type in TabActions (#19570) @notsidney
[TextField] Fix blurry text on label (#19547) @chybisov
[TextField] Fix label notch for custom htmlFontSize (#19558) @kusmierz
[Typography] Add missing classes to TypographyClassKey (#19588) @galechus
[l10n] Add Hungarian (hu-HU) locale (#19566) @vgaborabs
[l10n] Add Icelandic (is-IS) locale (#19538) @axelbjornsson

[docs] Add ToggleButton demo for not accepting null value (#19582) @LorenzHenk
[docs] Add blocks section to related-projects (#19562) @alexandre-lelain
[docs] Add generic props usage examples (#19341) @fyodore82
[docs] Add links to sandbox option in examples readme files (#19592) @garethx
[docs] Add new starting template (#19604) @dunky11
[docs] Add post-update to examples so they run on CodeSandbox (#19605) @garethx
[docs] Fix typo in the Avatar docs (#19544) @UltimateForm
[docs] Improve entry points for issue repros (#19501) @eps1lon
[docs] Link a VSCode extension for working with Material-UI (#19280) @jedwards1211
[docs] Notification blog post @oliviertassinari
[docs] Refactor EnchancedTable demo (#19560) @ahmad-reza619
[docs] The error style rule is a pseudo-class (#19555) @TommyJackson85
[docs] Update link to example for adding a new demo (#19590) @LorenzHenk

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