Update README.md

Author: lpatino10

README.md

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 [![Build Status](https://travis-ci.org/watson-developer-cloud/java-sdk.svg?branch=master)](https://travis-ci.org/watson-developer-cloud/java-sdk)
 [![Slack](https://wdc-slack-inviter.mybluemix.net/badge.svg)](https://wdc-slack-inviter.mybluemix.net)
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.ibm.watson/java-sdk/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.ibm.watson.developer_cloud/java-sdk)
+[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.ibm.watson/java-sdk/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.ibm.watson/java-sdk)
 [![CLA assistant](https://cla-assistant.io/readme/badge/watson-developer-cloud/java-sdk)](https://cla-assistant.io/watson-developer-cloud/java-sdk)
 
 Java client library to use the [Watson APIs][wdc].