build(deps): bump actions/checkout from 4.1.5 to 4.1.6 (#185)

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.1.5 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@44c2b7a...a5ac7e5)

---
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/tests.yml

@@ -10,7 +10,7 @@ jobs:
     name: Check track configuration
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b
+      - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29
       - name: Fetch
         run: bin/fetch-configlet
       - name: Lint
@@ -30,7 +30,7 @@ jobs:
     name: Check exercises
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b
+      - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29
       # It appears that the Ceylon tests work without having to do setup-java.
       # If in the future it breaks, try explicitly adding actions/setup-java@v1.
       # As of Ceylon 1.3.3, I couldn't get Ceylon to work with Java 9, 10, or 11,