Update actions/setup-python action to v6

Author: renovate[bot]

.github/workflows/test.yaml

@@ -20,7 +20,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: '3.x'