Build(deps): Bump @angular/common from 19.2.22 to 20.3.23 in /frontend

Bumps [@angular/common](https://github.com/angular/angular/tree/HEAD/packages/common) from 19.2.22 to 20.3.23.
- [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/v20.3.23/packages/common)

---
updated-dependencies:
- dependency-name: "@angular/common"
  dependency-version: 20.3.23
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

frontend/package-lock.json

@@ -12,7 +12,7 @@
   "private": true,
   "dependencies": {
     "@angular/animations": "^19.0.0",
-    "@angular/common": "^19.0.0",
+    "@angular/common": "^20.3.23",
     "@angular/compiler": "^19.0.0",
     "@angular/core": "^19.0.0",
     "@angular/forms": "^19.0.0",