chore(deps): Bump flutter_gen_runner

Bumps [flutter_gen_runner](https://github.com/FlutterGen/flutter_gen) from 4.3.0 to 5.2.0.
- [Release notes](https://github.com/FlutterGen/flutter_gen/releases)
- [Changelog](https://github.com/FlutterGen/flutter_gen/blob/main/CHANGELOG.md)
- [Commits](FlutterGen/flutter_gen@v4.3.0...v5.2.0)

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

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

flutter_news_example/packages/app_ui/pubspec.yaml

@@ -14,7 +14,7 @@ dependencies:
 
 dev_dependencies:
   build_runner: ^2.0.3
-  flutter_gen_runner: ^4.1.6
+  flutter_gen_runner: ^5.2.0
   flutter_test:
     sdk: flutter
   very_good_analysis: ^4.0.0