Bump @angular/forms from 12.2.6 to 12.2.13 in /frontend

Bumps [@angular/forms](https://github.com/angular/angular/tree/HEAD/packages/forms) from 12.2.6 to 12.2.13.
- [Release notes](https://github.com/angular/angular/releases)
- [Changelog](https://github.com/angular/angular/blob/master/CHANGELOG.md)
- [Commits](https://github.com/angular/angular/commits/12.2.13/packages/forms)

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

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

frontend/package-lock.json

@@ -545,9 +545,9 @@
       }
     },
     "@angular/forms": {
-      "version": "12.2.6",
-      "resolved": "https://registry.npmjs.org/@angular/forms/-/forms-12.2.6.tgz",
-      "integrity": "sha512-lY+A1q63C+ZIpbeVp9JP921lLawn7zELslV+DMd0hix7AXCG175OayeQPLXGFbHfYDRHL8QHTT+7X99k7sd3UA==",
+      "version": "12.2.13",
+      "resolved": "https://registry.npmjs.org/@angular/forms/-/forms-12.2.13.tgz",
+      "integrity": "sha512-wa7I5R8sck2q+VWNL262GJTVxtpEHMys8Bt6oE+lyHB5zlZAgOXwAb8GE4XVwuc+BZU1Gvrocn21P/8KvDY1uw==",
       "requires": {
         "tslib": "^2.2.0"
       },