Update actions/setup-python action to v6

Author: renovate[bot]

.github/workflows/run-tests.yaml

@@ -19,7 +19,7 @@ jobs:
         uses: "actions/checkout@v4.2.2"
 
       - name: Set up Python ${{ matrix.py_version }}
-        uses: actions/setup-python@v5.6.0
+        uses: actions/setup-python@v6.1.0
         with:
           python-version: ${{ matrix.py_version }}