README: minor fix

Author: icy

README.md

@@ -70,7 +70,7 @@ Touching file `.delete` doesn't support multiple actions in parallel.
 ```
 $ go get -u github.com/icy/gk8s
 $ mkdir -pv ~/.config/gk8s/
-$ ln -sv /path/to/cluster-config ~/.config/gk8s/my-cluster
+$ cp -fv /path/to/cluster-config ~/.config/gk8s/my-cluster
 ```
 
 Repeat the last steps for any other cluster.