build(deps): bump @angular/common in /frontend/src/angular

Bumps [@angular/common](https://github.com/angular/angular/tree/HEAD/packages/common) from 20.0.0 to 20.3.14.
- [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/20.3.14/packages/common)

---
updated-dependencies:
- dependency-name: "@angular/common"
  dependency-version: 20.3.14
  dependency-type: direct:production
...

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

Author: dependabot[bot]

frontend/src/angular/package-lock.json

@@ -22,7 +22,7 @@
   "dependencies": {
     "@angular/animations": "^20.0.0",
     "@angular/cdk": "^20.0.1",
-    "@angular/common": "^20.0.0",
+    "@angular/common": "^20.3.14",
     "@angular/compiler": "^20.0.0",
     "@angular/core": "^20.0.0",
     "@angular/forms": "^20.0.0",