add known users

README.md

@@ -156,3 +156,5 @@ The project is licensed under the [Apache 2 license](https://github.com/ctripcor
 ![狐狸金服](https://github.com/ctripcorp/apollo/blob/master/doc/images/known-users/huli-logo.png) 
 ![漫道集团](https://github.com/ctripcorp/apollo/blob/master/doc/images/known-users/mandao.png) 
 ![怪兽充电](https://github.com/ctripcorp/apollo/blob/master/doc/images/known-users/enmonster.png) 
+![南瓜租房](https://github.com/ctripcorp/apollo/blob/master/doc/images/known-users/nanguazufang.png) 
+![石投金融](https://github.com/ctripcorp/apollo/blob/master/doc/images/known-users/shitoujinrong.png)