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](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] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci-tests.yml

@@ -39,7 +39,7 @@ jobs:
           sudo apt-get install -y ./singularity-ce_4.2.1-noble_amd64.deb
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           allow-prereleases: true
           python-version: ${{ env.py-semver }}
@@ -93,7 +93,7 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ env.py-semver }}
           cache: pip
@@ -132,7 +132,7 @@ jobs:
           echo "CWL_SINGULARITY_CACHE=${CWL_SINGULARITY_CACHE}" >> "$GITHUB_ENV"
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: 3.12
           cache: pip

.github/workflows/tag_to_publish.yml

@@ -24,7 +24,7 @@ jobs:
           sudo apt-get install -y ./singularity-ce_4.2.1-noble_amd64.deb
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: 3.12