chore(deps): update actions/setup-python action to v6

Author: renovate[bot]

.github/workflows/pr-checks.yml

@@ -14,7 +14,7 @@ jobs:
 
       - name: Set up Python
         id: setup-python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
 
       - name: Run pre-commit checks
         id: pre-commit