Remove remaining 'controller' occurrences

hack/cluster-monitoring/deploy

@@ -10,7 +10,7 @@ kctl() {
     kubectl --kubeconfig="$KUBECONFIG" -n "monitoring" "$@"
 }
 
-kctl apply -f manifests/controllers/prometheus-controller.yaml
+kctl apply -f manifests/prometheus-operator.yaml
 
 # Wait for TPRs to be ready.
 until kctl get servicemonitor; do sleep 0.1; done