chore(deps): bump actions/checkout from 5 to 6 (#13)

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/main.yml

@@ -19,7 +19,7 @@ jobs:
           - "3.3.0"
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:

.github/workflows/release.yml

@@ -22,7 +22,7 @@ jobs:
           package-name: bundler-compose
           bump-minor-pre-major: true
           version-file: "lib/bundler/compose/version.rb"
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         if: ${{ steps.release.outputs.release_created }}
       - uses: ruby/setup-ruby@v1
         with: