Bump actions/setup-python from 5 to 6 (#1296)

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 5 to 6.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v5...v6)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/publish-to-pypi.yml

@@ -14,7 +14,7 @@ jobs:
       with:
         fetch-depth: 0
     - name: Set up Python 3.9
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: 3.9
 

.github/workflows/publish-to-test-pypi.yml

@@ -14,7 +14,7 @@ jobs:
       with:
         fetch-depth: 0
     - name: Set up Python 3.9
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: 3.9
 

.github/workflows/pythonpackage.yml

@@ -12,7 +12,7 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v5
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
@@ -33,7 +33,7 @@ jobs:
       with:
         fetch-depth: 2
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
@@ -60,7 +60,7 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v5
     - name: Set up Python ${{ matrix.python-version[0] }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version[0] }}
     - name: Install dependencies