build(deps): bump actions/setup-python from 5 to 6

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] <support@github.com>

.github/workflows/build.yml

@@ -234,7 +234,7 @@ jobs:
 
       # Released version of Cython has issues with Python 11. Set runner to use Python 3.10
       # https://github.com/cython/cython/issues/4500
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: '3.10'
       - name: Run Builds
@@ -350,7 +350,7 @@ jobs:
       - uses: actions/checkout@v5
       # Set up Python environment and install kconfiglib
       - name: Set up Python and install kconfiglib
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.10'
       - name: Install kconfiglib