add known user

Author: nobodyiam

README.md

@@ -205,3 +205,4 @@ The project is licensed under the [Apache 2 license](https://github.com/ctripcor
 ![震坤行](https://raw.githubusercontent.com/ctripcorp/apollo/master/doc/images/known-users/zkh-logo.png) 
 ![万谷盛世](https://raw.githubusercontent.com/ctripcorp/apollo/master/doc/images/known-users/wgss.png) 
 ![铂涛旅行](https://raw.githubusercontent.com/ctripcorp/apollo/master/doc/images/known-users/plateno.png) 
+![乐心](https://raw.githubusercontent.com/ctripcorp/apollo/master/doc/images/known-users/lifesense.png)