Add backupSet labels to wordpress' mariadb

flux2/apps/wordpress/wordpress-values-configmap.yaml

@@ -65,6 +65,8 @@ data:
           requests:
             cpu: 100m
             memory: 256Mi
+      commonLabels:
+        openappstack.net/backupSet: "wordpress"
 
     # It's advisable to set resource limits to prevent your K8s cluster from
     # crashing