Bump @angular/common and @angular/platform-browser

Bumps [@angular/common](https://github.com/angular/angular/tree/HEAD/packages/common) and [@angular/platform-browser](https://github.com/angular/angular/tree/HEAD/packages/platform-browser). These dependencies needed to be updated together.

Updates `@angular/common` from 12.2.17 to 21.0.1
- [Release notes](https://github.com/angular/angular/releases)
- [Changelog](https://github.com/angular/angular/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/angular/commits/21.0.1/packages/common)

Updates `@angular/platform-browser` from 12.2.17 to 21.0.1
- [Release notes](https://github.com/angular/angular/releases)
- [Changelog](https://github.com/angular/angular/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/angular/commits/21.0.1/packages/platform-browser)

---
updated-dependencies:
- dependency-name: "@angular/common"
  dependency-version: 21.0.1
  dependency-type: direct:development
- dependency-name: "@angular/platform-browser"
  dependency-version: 21.0.1
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

samples/client/petstore/typescript-angular-v12-provided-in-root/builds/with-npm/package-lock.json

@@ -21,11 +21,11 @@
     "rxjs": "^6.6.0"
   },
   "devDependencies": {
-    "@angular/common": "^12.2.0",
+    "@angular/common": "^21.0.1",
     "@angular/compiler": "^12.2.0",
     "@angular/compiler-cli": "^12.2.0",
     "@angular/core": "^12.2.0",
-    "@angular/platform-browser": "^12.2.0",
+    "@angular/platform-browser": "^21.0.1",
     "ng-packagr": "^12.2.1",
     "reflect-metadata": "^0.1.3",
     "rxjs": "^6.6.0",