doc(README): fix wrong path

Walker Leite · Walker Leite · commit 9add23152769 · 2018-02-28T15:39:26.000-03:00
diff --git a/README.md b/README.md
@@ -45,7 +45,7 @@ A Vue project template with [Loopback](http://loopback.io/) framework featuring
 ## Executing built files
 
 ```bash
-  $ cd build/client
+  $ cd build
   $ npm run start
 ```
 
diff --git a/template/README.md b/template/README.md
@@ -42,7 +42,7 @@
 ## Executing built files
 
 ```bash
-  $ cd build/client
+  $ cd build
   $ npm run start
 ```
 
