Bump @angular/compiler in /src/SampleApps/SampleApp.Angular/ClientApp

Bumps [@angular/compiler](https://github.com/angular/angular/tree/HEAD/packages/compiler) from 21.2.0 to 21.2.4.
- [Release notes](https://github.com/angular/angular/releases)
- [Changelog](https://github.com/angular/angular/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/angular/commits/v21.2.4/packages/compiler)

---
updated-dependencies:
- dependency-name: "@angular/compiler"
  dependency-version: 21.2.4
  dependency-type: direct:production
...

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Author: dependabot[bot]