[geolocator_apple]: Bump flutter_lints in /geolocator_apple/example (#1510)

Bumps [flutter_lints](https://github.com/flutter/packages/tree/main/packages) from 3.0.2 to 4.0.0.
- [Release notes](https://github.com/flutter/packages/releases)
- [Commits](https://github.com/flutter/packages/commits/flutter_lints-v4.0.0/packages)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

geolocator_apple/example/pubspec.yaml

@@ -35,7 +35,7 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
-  flutter_lints: ^3.0.1
+  flutter_lints: ^4.0.0
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec