mgr/dashboard: bump @angular-devkit/build-angular

Bumps [@angular-devkit/build-angular](https://github.com/angular/angular-cli) from 15.2.9 to 18.0.3.
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](angular/angular-cli@15.2.9...18.0.3)

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

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