build(deps): bump @angular/forms in /angular-example

Bumps [@angular/forms](https://github.com/angular/angular/tree/HEAD/packages/forms) from 19.2.15 to 20.3.3.
- [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/20.3.3/packages/forms)

---
updated-dependencies:
- dependency-name: "@angular/forms"
  dependency-version: 20.3.3
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

angular-example/package-lock.json

@@ -15,7 +15,7 @@
     "@angular/common": "^19.2.15",
     "@angular/compiler": "^19.2.15",
     "@angular/core": "^19.2.15",
-    "@angular/forms": "^19.2.15",
+    "@angular/forms": "^20.3.3",
     "@angular/platform-browser": "^19.2.15",
     "@angular/platform-browser-dynamic": "^19.2.15",
     "@angular/router": "^19.2.15",