Correct annotations in monitoring docs (#9976)

docs/user-guide/monitoring.md

@@ -39,8 +39,7 @@ This tutorial will show you how to install [Prometheus](https://prometheus.io/)
   controller:
     metrics:
       enabled: true
-      service:
-        annotations:
+    podAnnotations:
       prometheus.io/port: "10254"
       prometheus.io/scrape: "true"
   ..
@@ -50,10 +49,6 @@ This tutorial will show you how to install [Prometheus](https://prometheus.io/)
        ```
        apiVersion: v1
        kind: Service
-       metadata:
-        annotations:
-          prometheus.io/scrape: "true"
-          prometheus.io/port: "10254"
        ..
        spec:
          ports:
@@ -67,12 +62,16 @@ This tutorial will show you how to install [Prometheus](https://prometheus.io/)
          ```
          apiVersion: v1
          kind: Deployment
+         ..
+         spec:
+           template:
              metadata:
                annotations:
                  prometheus.io/scrape: "true"
                  prometheus.io/port: "10254"
-         ..
              spec:
+               containers:
+                 - name: controller
                    ports:
                      - name: prometheus
                        containerPort: 10254