ensure python for pre-commit is new enough

.github/workflows/test.yml

@@ -17,6 +17,11 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
 
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: 3.x
+
     - uses: actions/checkout@v3
 
     - name: pre-commit