Bump actions/setup-python from 5 to 6 (#11)

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 5 to 6.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](https://github.com/actions/setup-python/compare/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>
Co-authored-by: Eric Larson <[email protected]>

.github/workflows/test.yml

@@ -11,7 +11,7 @@ jobs:
     steps:
     - name: Checkout
       uses: actions/checkout@v6
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
     - run: pip install codespell
     - uses: ./
     - name: Check codespell
@@ -25,7 +25,7 @@ jobs:
     steps:
     - name: Checkout
       uses: actions/checkout@v6
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
     - run: pip install git+https://github.com/codespell-project/codespell.git
     - uses: ./
     - name: Check codespell