Bump lcollins/checkstyle-github-action from 2.0.0 to 3.0.0

Bumps [lcollins/checkstyle-github-action](https://github.com/lcollins/checkstyle-github-action) from 2.0.0 to 3.0.0.
- [Release notes](https://github.com/lcollins/checkstyle-github-action/releases)
- [Commits](https://github.com/lcollins/checkstyle-github-action/compare/v2.0.0...v3.0.0)

---
updated-dependencies:
- dependency-name: lcollins/checkstyle-github-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/ci.yml

@@ -132,7 +132,7 @@ jobs:
         run: bundle exec slim-lint app/views --reporter checkstyle > checkstyle-result.xml
 
       - name: Upload slim-lint results as GitHub annotations
-        uses: lcollins/checkstyle-github-action@v2.0.0
+        uses: lcollins/checkstyle-github-action@v3.0.0
         # Only create GitHub annotations for the main repo (disable for forks):
         if: ${{ github.event.pull_request.head.repo.full_name == github.repository }}
         with: