Bump @angular/cli from 16.1.5 to 16.1.6 in /frontend

Bumps [@angular/cli](https://github.com/angular/angular-cli) from 16.1.5 to 16.1.6.
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](angular/angular-cli@16.1.5...16.1.6)

---
updated-dependencies:
- dependency-name: "@angular/cli"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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