Bump @angular/common, @angular/forms, @angular/platform-browser, @angular/platform-browser-dynamic and @angular/router

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

Updates `@angular/common` from 18.2.6 to 21.0.6
- [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/v21.0.6/packages/common)

Updates `@angular/forms` from 18.2.6 to 21.0.6
- [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/v21.0.6/packages/forms)

Updates `@angular/platform-browser` from 18.2.6 to 21.0.6
- [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/v21.0.6/packages/platform-browser)

Updates `@angular/platform-browser-dynamic` from 18.2.6 to 21.0.6
- [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/v21.0.6/packages/platform-browser-dynamic)

Updates `@angular/router` from 18.2.6 to 21.0.6
- [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/v21.0.6/packages/router)

---
updated-dependencies:
- dependency-name: "@angular/common"
  dependency-version: 21.0.6
  dependency-type: direct:production
- dependency-name: "@angular/forms"
  dependency-version: 21.0.6
  dependency-type: direct:production
- dependency-name: "@angular/platform-browser"
  dependency-version: 21.0.6
  dependency-type: direct:production
- dependency-name: "@angular/platform-browser-dynamic"
  dependency-version: 21.0.6
  dependency-type: direct:production
- dependency-name: "@angular/router"
  dependency-version: 21.0.6
  dependency-type: direct:production
...

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Author: dependabot[bot]