Update README.md

Author: hustcc

README.md

@@ -106,7 +106,7 @@ Online demo click [here](https://git.hust.cc/size-sensor). Used By:
 
  - [hustcc/echarts-for-react](https://github.com/hustcc/echarts-for-react)
  - [hustcc/canvas-nest.js](https://github.com/hustcc/canvas-nest.js)
- - [hustcc/gantt-for-react](https://github.com/hustcc/gantt-for-react)
+ - [antvis/x6](https://github.com/antvis/x6)