Bump actions/setup-python from 2.3.0 to 2.3.1

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 2.3.0 to 2.3.1.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v2.3.0...v2.3.1)

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

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

Author: dependabot[bot]

.github/workflows/pythonpackage.yml

@@ -22,7 +22,7 @@ jobs:
     steps:
     - uses: actions/[email protected]
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/[email protected].0
+      uses: actions/[email protected].1
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies