Bump firebase_auth from 3.3.15 to 3.3.16 in /experimental/web_dashboard (#1172)

Bumps [firebase_auth](https://github.com/FirebaseExtended/flutterfire) from 3.3.15 to 3.3.16.
- [Release notes](https://github.com/FirebaseExtended/flutterfire/releases)
- [Changelog](https://github.com/firebase/flutterfire/blob/master/CHANGELOG.md)
- [Commits](https://github.com/FirebaseExtended/flutterfire/compare/firebase_auth-v3.3.15...firebase_auth-v3.3.16)

---
updated-dependencies:
- dependency-name: firebase_auth
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

experimental/web_dashboard/pubspec.lock

@@ -224,7 +224,7 @@ packages:
       name: firebase_auth
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.3.15"
+    version: "3.3.16"
   firebase_auth_platform_interface:
     dependency: transitive
     description:

experimental/web_dashboard/pubspec.yaml

@@ -9,7 +9,7 @@ dependencies:
     sdk: flutter
   cloud_firestore: ^3.1.13
   cupertino_icons: ^1.0.0
-  firebase_auth: ^3.3.15
+  firebase_auth: ^3.3.16
   firebase_core: ^1.15.0
   google_sign_in: ^5.0.0
   json_annotation: ^4.1.0