revise the reference

README.md

@@ -265,7 +265,7 @@ If you find this work or code is helpful in your research, please cite:
 
 @article{YuanCW19,
   title={Object-Contextual Representations for Semantic Segmentation},
-  author={Yuan, Yuhui and Chen, Xilin and Wang, Jingdong},
+  author={Yuhui Yuan and Xilin Chen and Jingdong Wang},
   booktitle={ECCV},
   year={2020}
 }