build(deps-dev): bump @angular/build in /angular-example

Bumps [@angular/build](https://github.com/angular/angular-cli) from 19.2.17 to 20.3.3.
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](angular/angular-cli@19.2.17...20.3.3)

---
updated-dependencies:
- dependency-name: "@angular/build"
  dependency-version: 20.3.3
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]