修改介绍

README.md

 # Nepxion Discovery
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg?label=license)](https://github.com/Nepxion/Discovery/blob/master/LICENSE)
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-[![Javadocs](http://www.javadoc.io/badge/com.nepxion/discovery-plugin.svg)](http://www.javadoc.io/doc/com.nepxion/discovery-plugin)
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 Nepxion Discovery是一款对Spring Cloud Discovery的服务注册增强插件，支持Eureka、Consul和Zookeeper。现有的Spring Cloud微服务可以方便引入该插件，使用者不需要对业务代码做任何修改，只需要做三个非常容易的事情