Bump actions/checkout from 4.1.5 to 4.1.6

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@v4.1.5...v4.1.6)

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

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

.github/workflows/ci.yml

@@ -67,7 +67,7 @@ jobs:
             python-version: "3.8"
     steps:
     - name: Checkout
-      uses: actions/checkout@v4.1.5
+      uses: actions/checkout@v4.1.6
       with:
         fetch-depth: 0
 
@@ -118,7 +118,7 @@ jobs:
     if: always() && contains('success,failure', needs.unit-tests.result)
     steps:
     - name: Checkout
-      uses: actions/checkout@v4.1.5
+      uses: actions/checkout@v4.1.6
       with:
         fetch-depth: 0