Bump @angular-devkit/build-angular from 13.2.6 to 13.3.4 in /frontend

Bumps [@angular-devkit/build-angular](https://github.com/angular/angular-cli) from 13.2.6 to 13.3.4.
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/angular-cli/compare/13.2.6...13.3.4)

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

Signed-off-by: dependabot[bot] <support@github.com>

frontend/package.json

@@ -28,7 +28,7 @@
     "zone.js": "~0.11.4"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "~13.2.5",
+    "@angular-devkit/build-angular": "~13.3.4",
     "@angular-eslint/builder": "13.2.1",
     "@angular-eslint/eslint-plugin": "13.2.1",
     "@angular-eslint/eslint-plugin-template": "13.2.1",