[geolocator_android]: Bump flutter_lints in /geolocator_android

Bumps [flutter_lints](https://github.com/flutter/packages/tree/main/packages) from 4.0.0 to 6.0.0.
- [Release notes](https://github.com/flutter/packages/releases)
- [Commits](https://github.com/flutter/packages/commits/flutter_lints-v6.0.0/packages)

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

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

Author: dependabot[bot]

geolocator_android/pubspec.yaml

@@ -28,6 +28,6 @@ dev_dependencies:
   async: ^2.8.2
   flutter_test:
     sdk: flutter
-  flutter_lints: ">=3.0.0 <5.0.0"
+  flutter_lints: ">=3.0.0 <7.0.0"
   mockito: ^5.2.0
   plugin_platform_interface: ^2.1.2