Update windows containers deployment (#16749)

There are two fixes in this change. First, the yaml is left justified in order to ease copying. Secondly, the selector field is added to the deployment.

content/en/docs/setup/production-environment/windows/user-guide-windows-containers.md

@@ -30,13 +30,13 @@ Windows applications constitute a large portion of the services and applications
 To deploy a Windows container on Kubernetes, you must first create an example application. The example YAML file below creates a simple webserver application. Create a service spec named `win-webserver.yaml` with the contents below:
 
 ```yaml
-    apiVersion: v1
-    kind: Service
-    metadata:
+apiVersion: v1
+kind: Service
+metadata:
   name: win-webserver
   labels:
     app: win-webserver
-    spec:
+spec:
   ports:
     # the port that this service should serve on
     - port: 80
@@ -44,15 +44,18 @@ To deploy a Windows container on Kubernetes, you must first create an example ap
   selector:
     app: win-webserver
   type: NodePort
-    ---
-    apiVersion: apps/v1
-    kind: Deployment
-    metadata:
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
   labels:
     app: win-webserver
   name: win-webserver
-    spec:
+spec:
   replicas: 2
+  selector:
+    matchLabels:
+      app: win-webserver
   template:
     metadata:
       labels: