Bump actions/setup-python from 5.6.0 to 6.0.0

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 5.6.0 to 6.0.0.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](https://github.com/actions/setup-python/compare/v5.6.0...v6.0.0)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/pythonpackage-windows.yml

@@ -19,7 +19,7 @@ jobs:
       with:
         submodules: 'recursive'
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5.6.0
+      uses: actions/setup-python@v6.0.0
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies

.github/workflows/pythonpackage.yml

@@ -22,7 +22,7 @@ jobs:
       with:
         submodules: 'recursive'
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5.6.0
+      uses: actions/setup-python@v6.0.0
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies