chore(deps): Bump google_mobile_ads

Bumps [google_mobile_ads](https://github.com/googleads/googleads-mobile-flutter/tree/main/packages) from 5.3.1 to 6.0.0.
- [Release notes](https://github.com/googleads/googleads-mobile-flutter/releases)
- [Commits](https://github.com/googleads/googleads-mobile-flutter/commits/HEAD/packages)

---
updated-dependencies:
- dependency-name: google_mobile_ads
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

flutter_news_example/packages/ads_consent_client/pubspec.yaml

@@ -9,7 +9,7 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  google_mobile_ads: ^5.0.0
+  google_mobile_ads: ^6.0.0
 
 dev_dependencies:
   flutter_test: