chore(deps): bump flutter_lints from 5.0.0 to 6.0.0 (#2099)

Bumps [flutter_lints](https://github.com/flutter/packages/tree/main/packages) from 5.0.0 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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Joscha Eckert <[email protected]>

Author: dependabot[bot]

pubspec.yaml

@@ -40,7 +40,7 @@ dependencies:
   vector_math: ^2.1.4
 
 dev_dependencies:
-  flutter_lints: ">=4.0.0 <6.0.0"
+  flutter_lints: ">=4.0.0 <7.0.0"
   flutter_test:
     sdk: flutter
   mocktail: ^1.0.3