chore(deps-dev): bump @angular/compiler-cli in /edc-policy-playground

Bumps [@angular/compiler-cli](https://github.com/angular/angular/tree/HEAD/packages/compiler-cli) from 18.0.6 to 20.0.4.
- [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/20.0.4/packages/compiler-cli)

---
updated-dependencies:
- dependency-name: "@angular/compiler-cli"
  dependency-version: 20.0.4
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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Author: dependabot[bot]