Bump google_sign_in from 5.3.0 to 5.3.1 in /experimental/web_dashboard (#1244)

Bumps [google_sign_in](https://github.com/flutter/plugins) from 5.3.0 to 5.3.1.
- [Release notes](https://github.com/flutter/plugins/releases)
- [Commits](https://github.com/flutter/plugins/compare/google_sign_in-v5.3.0...google_sign_in-v5.3.1)

---
updated-dependencies:
- dependency-name: google_sign_in
  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.yaml

@@ -11,7 +11,7 @@ dependencies:
   cupertino_icons: ^1.0.0
   firebase_auth: ^3.3.17
   firebase_core: ^1.16.0
-  google_sign_in: ^5.0.0
+  google_sign_in: ^5.3.1
   json_annotation: ^4.5.0
   provider: ^6.0.0
   uuid: ^3.0.0