Bump actions/checkout from 4.1.4 to 4.1.6 (#64)

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.1.4 to 4.1.6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4.1.4...v4.1.6)

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

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

.github/workflows/main.yml

@@ -11,7 +11,7 @@ jobs:
         ruby: [3.1,3.2]
 
     steps:
-    - uses: actions/[email protected].4
+    - uses: actions/[email protected].6
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with: