Merge pull request #11010 from etcd-io/wenjiaswe-patch-1

functional: Update functional test README.md

functional/README.md

@@ -16,7 +16,7 @@ PASSES=functional ./test
 
 ```bash
 pushd ..
-make build-docker-functional
+make build-docker-functional push-docker-functional pull-docker-functional
 popd
 ```