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] <[email protected]>

.github/workflows/docs.yaml

@@ -34,13 +34,13 @@ jobs:
       OS: ${{ matrix.os }}
       UPLOAD_TO_GHPAGES: ${{ matrix.os == 'ubuntu-latest' && matrix.python-version == '3.10' && github.event_name == 'push' && github.ref == 'refs/heads/main' }}
     steps:
-    - uses: actions/[email protected].5
+    - uses: actions/[email protected].6
       with:
         fetch-depth: '0'
         # if we upload to ghpages we need the full
         # history to generate correct version info
       if: ${{ fromJSON(env.UPLOAD_TO_GHPAGES) }}
-    - uses: actions/[email protected].5
+    - uses: actions/[email protected].6
       if: ${{ !fromJSON(env.UPLOAD_TO_GHPAGES) }}
     - name: setup ubuntu-latest xvfb
       uses: ./.github/actions/setup-ubuntu-latest-xvfb

.github/workflows/pytest.yaml

@@ -37,7 +37,7 @@ jobs:
       PYTHON: ${{ matrix.python-version }}
 
     steps:
-    - uses: actions/[email protected].5
+    - uses: actions/[email protected].6
       with:
         submodules: true
     - name: setup ubuntu-latest xvfb

.github/workflows/upload_to_pypi.yaml

@@ -12,7 +12,7 @@ jobs:
       id-token: write
     environment: pypi-release-env
     steps:
-    - uses: actions/[email protected].5
+    - uses: actions/[email protected].6
     - name: Set up Python
       uses: actions/[email protected]
       with: