Bump the angular group with 4 updates

Bumps the angular group with 4 updates: [@angular/ssr](https://github.com/angular/angular-cli), [@angular-devkit/build-angular](https://github.com/angular/angular-cli), [@angular/cli](https://github.com/angular/angular-cli) and [@ngtools/webpack](https://github.com/angular/angular-cli).


Updates `@angular/ssr` from 20.3.20 to 20.3.21
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](angular/angular-cli@v20.3.20...v20.3.21)

Updates `@angular-devkit/build-angular` from 20.3.20 to 20.3.21
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](angular/angular-cli@v20.3.20...v20.3.21)

Updates `@angular/cli` from 20.3.20 to 20.3.21
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](angular/angular-cli@v20.3.20...v20.3.21)

Updates `@ngtools/webpack` from 20.3.20 to 20.3.21
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](angular/angular-cli@v20.3.20...v20.3.21)

---
updated-dependencies:
- dependency-name: "@angular/ssr"
  dependency-version: 20.3.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: angular
- dependency-name: "@angular-devkit/build-angular"
  dependency-version: 20.3.21
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: angular
- dependency-name: "@angular/cli"
  dependency-version: 20.3.21
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: angular
- dependency-name: "@ngtools/webpack"
  dependency-version: 20.3.21
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: angular
...

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Author: dependabot[bot]