Update README.md

Author: binarywang

README.md

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 ![doodles](https://www.google.com/logos/doodles/2016/teachers-day-2016-us-6296626244091904.2-hp2x.gif)
 
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-[![Build Status](https://travis-ci.org/wechat-group/weixin-java-tools-springmvc.svg?branch=master)](https://travis-ci.org/wechat-group/weixin-java-tools-springmvc)
+[![Build Status](https://travis-ci.org/Wechat-Group/weixin-java-tools-springmvc.svg?branch=master)](https://travis-ci.org/Wechat-Group/weixin-java-tools-springmvc)
 
 This repository is a wechat springmvc demo based on **weixin-java-tools**