Update README.md

Author: Wscats

README.md

@@ -29,7 +29,7 @@ _:rabbit:angular的学习资料 These are about angular learning materials, hopi
 | Service ||
 | ------------- |:-------------:| :-------------:| :-------------:| -----:|
 |[Angular自定义服务的常用方法](https://github.com/Wscats/angular-demo/blob/gh-pages/%E5%B8%B8%E7%94%A8%E8%87%AA%E5%AE%9A%E4%B9%89%E6%9C%8D%E5%8A%A1%E6%96%B9%E6%B3%95.md)|[Angular部分服务demo](https://wscats.github.io/angular-demo/部分服务demo.html)|
-|[Angular自定义Canvas画图服务](https://wscats.github.io/angular-demo/Angular自定义Canvas画图服务.html)||
+|[Angular自定义Canvas画图服务](https://wscats.github.io/angular-demo/Angular自定义Canvas画图服务.html)|[Angular自定义http服务](https://wscats.github.io/angular-demo/自定义http服务.html)|
 
 ## 组件与指令
 | Directive ||