Add code comment for "replicas"

unnecessary code comment been removed.

docs/tutorials/stateless-application/deployment-scale.yaml

@@ -3,7 +3,7 @@ kind: Deployment
 metadata:
   name: nginx-deployment
 spec:
-  replicas: 4
+  replicas: 4 # Update the replicas from 2 to 4
   template:
     metadata:
       labels:
@@ -11,6 +11,6 @@ spec:
     spec:
       containers:
       - name: nginx
-        image: nginx:1.8 # Update the version of nginx from 1.7.9 to 1.8
+        image: nginx:1.8
         ports:
         - containerPort: 80