Bump actions/setup-python from 5 to 6 (#4284)

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

.github/workflows/artifacts-index.yaml

@@ -44,7 +44,7 @@ jobs:
           persist-credentials: false
 
       - name: Setup Python version ${{ env.PYTHON_VERSION }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ env.PYTHON_VERSION }}
 

.github/workflows/build.yaml

@@ -234,7 +234,7 @@ jobs:
 
       - name: Setup Python version ${{ env.PYTHON_VERSION }}
         if: ${{ github.event_name != 'release' }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ env.PYTHON_VERSION }}
 

.github/workflows/test.yaml

@@ -42,7 +42,7 @@ jobs:
           sudo apt install -y qemu-system-x86 ovmf
 
       - name: Setup Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: 3.12