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
...

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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: