Bump @angular/common from 21.2.18 to 21.2.20

Bumps [@angular/common](https://github.com/angular/angular/tree/HEAD/packages/common) from 21.2.18 to 21.2.20.
- [Release notes](https://github.com/angular/angular/releases)
- [Changelog](https://github.com/angular/angular/blob/v21.2.20/CHANGELOG.md)
- [Commits](https://github.com/angular/angular/commits/v21.2.20/packages/common)

---
updated-dependencies:
- dependency-name: "@angular/common"
  dependency-version: 21.2.20
  dependency-type: direct:development
...

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

Author: dependabot[bot]

package-lock.json

@@ -47,7 +47,7 @@
     "@angular/build": "21.2.19",
     "@angular/cdk": "21.2.14",
     "@angular/cli": "21.2.19",
-    "@angular/common": "21.2.18",
+    "@angular/common": "21.2.20",
     "@angular/compiler": "21.2.18",
     "@angular/compiler-cli": "21.2.18",
     "@angular/core": "21.2.18",