Bump postcss and @angular-devkit/build-angular in /angular/angular

Bumps [postcss](https://github.com/postcss/postcss) to 8.5.19 and updates ancestor dependency [@angular-devkit/build-angular](https://github.com/angular/angular-cli). These dependencies need to be updated together.


Updates `postcss` from 8.4.5 to 8.5.19
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.4.5...8.5.19)

Updates `@angular-devkit/build-angular` from 13.2.6 to 22.1.2
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/angular-cli/compare/13.2.6...v22.1.2)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.19
  dependency-type: indirect
- dependency-name: "@angular-devkit/build-angular"
  dependency-version: 22.1.2
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

angular/angular/package.json

@@ -23,7 +23,7 @@
     "zone.js": "~0.11.4"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "^13.2.6",
+    "@angular-devkit/build-angular": "^22.1.2",
     "@angular/cli": "~13.0.1",
     "@angular/compiler-cli": "~13.0.0",
     "@types/jasmine": "~3.10.0",