Update create-external-load-balancer.md

modify the "." of the sentence

docs/tasks/access-application-cluster/create-external-load-balancer.md

@@ -65,7 +65,7 @@ kubectl expose rc example --port=8765 --target-port=9376 \
 
 This command creates a new service using the same selectors as the referenced
 resource (in the case of the example above, a replication controller named
-`example`.)
+`example`).
 
 For more information, including optional flags, refer to the
 [`kubectl expose` reference](/docs/user-guide/kubectl/v1.6/#expose).