Bump @angular-devkit/build-angular from 19.0.6 to 19.1.5 in /angular

Bumps [@angular-devkit/build-angular](https://github.com/angular/angular-cli) from 19.0.6 to 19.1.5.
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](angular/angular-cli@19.0.6...19.1.5)

---
updated-dependencies:
- dependency-name: "@angular-devkit/build-angular"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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