Update README.md

Author: nobodyiam

README.md

@@ -122,3 +122,4 @@ The project is licensed under the [Apache 2 license](https://github.com/ctripcor
 ![易微行](https://github.com/ctripcorp/apollo/blob/master/doc/images/known-users/feezu.png) 
 ![人才加](https://github.com/ctripcorp/apollo/blob/master/doc/images/known-users/rencaijia.png) 
 ![乐刻运动](https://github.com/ctripcorp/apollo/blob/master/doc/images/known-users/leoao.png) 
+![大疆](https://github.com/ctripcorp/apollo/blob/master/doc/images/known-users/dji.png)