Bump @angular/common from 19.1.4 to 21.2.9

Bumps [@angular/common](https://github.com/angular/angular/tree/HEAD/packages/common) from 19.1.4 to 21.2.9.
- [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/v21.2.9/packages/common)

---
updated-dependencies:
- dependency-name: "@angular/common"
  dependency-version: 21.2.9
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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