chore(deps-dev): bump @angular/cli from 20.3.22 to 21.2.6

Bumps [@angular/cli](https://github.com/angular/angular-cli) from 20.3.22 to 21.2.6.
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](angular/angular-cli@v20.3.22...v21.2.6)

---
updated-dependencies:
- dependency-name: "@angular/cli"
  dependency-version: 21.2.6
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]