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

Bumps [@angular/cli](https://github.com/angular/angular-cli) from 18.0.7 to 20.3.9.
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](angular/angular-cli@18.0.7...20.3.9)

---
updated-dependencies:
- dependency-name: "@angular/cli"
  dependency-version: 20.3.9
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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Author: dependabot[bot]