Bump @angular/common from 19.2.14 to 20.1.4 in /web_embedding/ng-flutter

Bumps [@angular/common](https://github.com/angular/angular/tree/HEAD/packages/common) from 19.2.14 to 20.1.4.
- [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/20.1.4/packages/common)

---
updated-dependencies:
- dependency-name: "@angular/common"
  dependency-version: 20.1.4
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

web_embedding/ng-flutter/package.json

@@ -13,7 +13,7 @@
   "dependencies": {
     "@angular/animations": "^20.0.3",
     "@angular/cdk": "^20.1.0",
-    "@angular/common": "^19.0.0",
+    "@angular/common": "^20.1.4",
     "@angular/compiler": "^20.0.6",
     "@angular/core": "^20.0.3",
     "@angular/forms": "^20.1.2",