Bump actions/setup-python from 5 to 6 (#634)

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

Author: dependabot[bot]

.github/workflows/ci_MASTER.yml

@@ -61,7 +61,7 @@ jobs:
 
       - name: Setup Python 3.13 🐍
         if: ${{ steps.gate.outputs.code == 'true' }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: 3.13
           cache: 'pip'

.github/workflows/ci_PR.yml

@@ -59,7 +59,7 @@ jobs:
 
       - name: Setup Python 3.13 🐍
         if: ${{ steps.changed.outputs.code == 'true' }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: 3.13
           cache: 'pip'