bump test version

Author: Avi-Robusta

.github/workflows/test-prometrix.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v2
         with:
-          python-version: 3.8
+          python-version: 3.9
 
       - name: Create k8s Kind Cluster
         uses: helm/[email protected]