Bump actions/setup-python from 5 to 6 (backport #110) (#112)

Author: mergify[bot]

.github/workflows/ci-format.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       with:
         python-version: '3.10'
     - uses: pre-commit/[email protected]