docs: update code sample in README.md (#124)

README.md

@@ -98,7 +98,7 @@ With Lux your code from before can now look like this:
 class PostsController extends Controller {
   @action
   index(req, res) {
-    return this.store.query('post', req.params);
+    return Post.findAll();
   }
 }
 ```