Bump actions/setup-python from 4 to 6 (#44)

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 4 to 6.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v4...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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/publish.yml

@@ -12,7 +12,7 @@ jobs:
     steps:
     - uses: actions/checkout@v6
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: 3.x
     - name: Install dependencies

.github/workflows/test.yml

@@ -26,7 +26,7 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v6
 
-    - uses: actions/setup-python@v4
+    - uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}