Merge pull request #386 from graphcool/fixes

Readme rename of package

Author: schickling

README.md

@@ -161,10 +161,10 @@ functions:
 
 ## Development [![npm version](https://badge.fury.io/js/graphql-playground.svg)](https://badge.fury.io/js/graphql-playground)  [![CircleCI](https://circleci.com/gh/graphcool/graphql-playground.svg?style=shield)](https://circleci.com/gh/graphcool/graphql-playground)
 
-This is a mono-repo setup containing packages for the `graphql-playground` and `graphql-playground-electron`.
+This is a mono-repo setup containing packages for the `graphql-playground-react` and `graphql-playground-electron`.
 
 ```sh
-$ cd packages/graphql-playground
+$ cd packages/graphql-playground-react
 $ yarn
 $ yarn start
 ```