ci from blue to green

README.md

 # Wechaty [![NPM Version](https://badge.fury.io/js/wechaty.svg)](https://www.npmjs.com/package/wechaty) [![NPM](https://github.com/wechaty/wechaty/workflows/NPM/badge.svg)](https://github.com/wechaty/wechaty/actions?query=workflow%3ANPM) [![Docker](https://github.com/wechaty/wechaty/workflows/Docker/badge.svg)](https://github.com/wechaty/wechaty/actions?query=workflow%3ADocker)
 
-[![Wechaty](https://wechaty.github.io/wechaty/images/wechaty-logo-en.png)](https://github.com/wechaty/wechaty)
+[![Wechaty](https://wechaty.github.io/wechaty/images/wechaty-logo-green-en.png)](https://github.com/wechaty/wechaty)
 
 [![Downloads](https://img.shields.io/npm/dm/wechaty.svg?style=flat-square)](https://www.npmjs.com/package/wechaty)
 [![GitHub stars](https://img.shields.io/github/stars/wechaty/wechaty.svg?label=github%20stars)](https://github.com/wechaty/wechaty)