release: 12.0.0-rc.0 and 11.2.10 changelog (#22532)

Author: wagnermaciel

CHANGELOG.md

@@ -1,3 +1,24 @@
+# 12.0.0-rc.0 "charcoal-pencil" (2021-04-21)
+
+### material
+
+|            |                       |
+| ---------- | --------------------- |
+| bug fix |  **autocomplete:** error if keydown is dispatched too early ([#22513](https://github.com/angular/components/issues/22513)) ([9e68bf87a98244eb7494b30be47bcea241262013](https://github.com/angular/components/commit/9e68bf87a98244eb7494b30be47bcea241262013)), closes [#22511](https://github.com/angular/components/issues/22511) |
+| bug fix |  **schematics:** replace removed variables with their values in sass api migration ([#22505](https://github.com/angular/components/issues/22505)) ([4f6bf3ae00c79729f4340df297dab58a93645e61](https://github.com/angular/components/commit/4f6bf3ae00c79729f4340df297dab58a93645e61)) |
+| bug fix |  **snack-bar:** clear timeout upon dismiss with action ([#22485](https://github.com/angular/components/issues/22485)) ([f3dcfa9033ba07bb97cbcdf8d85f9a275bc67904](https://github.com/angular/components/commit/f3dcfa9033ba07bb97cbcdf8d85f9a275bc67904)), closes [#4860](https://github.com/angular/components/issues/4860) |
+
+
+## 11.2.10 "walnut-tabletop" (2021-04-21)
+
+### material
+
+|            |                       |
+| ---------- | --------------------- |
+| bug fix |  **autocomplete:** error if keydown is dispatched too early ([#22513](https://github.com/angular/components/issues/22513)) ([da92944699327942495145f67b6982118d513419](https://github.com/angular/components/commit/da92944699327942495145f67b6982118d513419)), closes [#22511](https://github.com/angular/components/issues/22511) |
+| bug fix |  **snack-bar:** clear timeout upon dismiss with action ([#22485](https://github.com/angular/components/issues/22485)) ([1a1528de123b334dffd1f95c4be7458fb2dfb25c](https://github.com/angular/components/commit/1a1528de123b334dffd1f95c4be7458fb2dfb25c)), closes [#4860](https://github.com/angular/components/issues/4860) |
+
+
 # 12.0.0-next.7 "porcelain-daydream" (2021-04-14)
 
 ### cdk
@@ -179,7 +200,7 @@ _Breaking changes:_
 Sass theming API has been reworked so that clients can take advantage of `@use`. This includes:
   * A single entry point into `@angular/material` and `@angular/cdk`
   * Renamed functions, mixins, and variables to be a better reflection of what they do
- 
+
 For more information, check out the [new theming guide](https://github.com/angular/components/blob/master/guides/theming.md).
 
 ### cdk