Bump actions/checkout from 3.0.2 to 3.1.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 3.0.2 to 3.1.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3.0.2...v3.1.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/docs.yaml

@@ -27,13 +27,13 @@ jobs:
       OS: ${{ matrix.os }}
       UPLOAD_TO_GHPAGES: ${{ matrix.os == 'ubuntu-latest' && matrix.python-version == '3.7' && github.event_name == 'push' && github.ref == 'refs/heads/master' }}
     steps:
-    - uses: actions/checkout@v3.0.2
+    - uses: actions/checkout@v3.1.0
       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/checkout@v3.0.2
+    - uses: actions/checkout@v3.1.0
       if: ${{ !fromJSON(env.UPLOAD_TO_GHPAGES) }}
     - name: setup ubuntu-latest xvfb
       uses: ./.github/actions/setup-ubuntu-latest-xvfb

.github/workflows/pytest.yaml

@@ -30,7 +30,7 @@ jobs:
       PYTHON: ${{ matrix.python-version }}
 
     steps:
-    - uses: actions/checkout@v3.0.2
+    - uses: actions/checkout@v3.1.0
       with:
         submodules: true
     - name: setup ubuntu-latest xvfb

.github/workflows/upload_to_pypi.yaml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3.0.2
+    - uses: actions/checkout@v3.1.0
     - name: Set up Python
       uses: actions/[email protected]
       with: