Corrected service dns name

I think data.prod.cluster.local should change to data.prod.svc.cluster.local

Author: kpanic9

content/en/docs/concepts/services-networking/dns-pod-service.md

@@ -49,7 +49,7 @@ options ndots:5
 ```
 
 In summary, a pod in the _test_ namespace can successfully resolve either 
-`data.prod` or `data.prod.cluster.local`.
+`data.prod` or `data.prod.svc.cluster.local`.
 
 ### DNS Records