Update README.md

Fixed Maven Badge Link

Author: kdavisk6

README.md

@@ -2,7 +2,7 @@
 
 [![Join the chat at https://gitter.im/OpenFeign/feign](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/OpenFeign/feign?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![Build Status](https://travis-ci.org/OpenFeign/feign.svg?branch=master)](https://travis-ci.org/OpenFeign/feign)
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/io.github.openfeign/feign-core/badge.png)](https://maven-badges.herokuapp.com/maven-central/io.github.openfeign/feign-core)
+[![Maven Central](https://maven-badges.herokuapp.com/maven-central/io.github.openfeign/feign-core/badge.png)](https://search.maven.org/artifact/io.github.openfeign/feign-core/)
 
 Feign is a Java to HTTP client binder inspired by [Retrofit](https://github.com/square/retrofit), [JAXRS-2.0](https://jax-rs-spec.java.net/nonav/2.0/apidocs/index.html), and [WebSocket](http://www.oracle.com/technetwork/articles/java/jsr356-1937161.html).  Feign's first goal was reducing the complexity of binding [Denominator](https://github.com/Netflix/Denominator) uniformly to HTTP APIs regardless of [ReSTfulness](http://www.slideshare.net/adrianfcole/99problems).