v4.12.2

@material-ui/[email protected]

• [Accordion, Collapse] Fix failed proptype error (#27307) @serenalin121
• [Accordion] Ensure AccordionSummary backwards compatible deprecation of classes.focused (#27351) @eps1lon
• [TextField] Add support for `minRows` (#27293) @eps1lon

Docs

• [blog] Danilo Leal joins Material-UI (#27231) @oliviertassinari
• [blog] Jun did join in Q1 @oliviertassinari
• [blog] Fix typo @oliviertassinari
• [blog] Q2 2021 Update (#27089) @oliviertassinari
• [docs] Add constant for the banner height (#27309) @mnajdova
• [docs] Fix various layout issues with the v5 banner (#27237) @mnajdova
• [docs] Fix https protocol (#27262) @m4theushw
• [docs] Remove Ethical Ads (#27173) @mbrookes
• [website] Open 4 new roles (#27123) @oliviertassinari

All contributors of this release in alphabetical order: @eps1lon, @m4theushw, @mbrookes, @mnajdova, @oliviertassinari, @serenalin121