updated nginx version to follow examples correctly

following examples https://kubernetes.io/docs/tasks/run-application/run-stateless-application-deployment/#scaling-the-application-by-increasing-the-replica-count
If you update replicas from 2 to 4 using the last deployment yaml, nginx version was 1.16.1, so 2 containers were already created and 2 new ones (that's why the table referenced as "The output is similar to this" shows AGE as 25s and 2m). If this deployment has nginx version 1.14.2, all containers will be recreated instead of just adding 2, so it can be confusing for the newcomers

content/en/examples/application/deployment-scale.yaml

@@ -14,6 +14,6 @@ spec:
     spec:
       containers:
       - name: nginx
-        image: nginx:1.14.2
+        image: nginx:1.16.1
         ports:
         - containerPort: 80