revise the reference

Author: PkuRainBow

README.md

@@ -259,14 +259,14 @@ If you find this work or code is helpful in your research, please cite:
   author={Jingdong Wang and Ke Sun and Tianheng Cheng and 
           Borui Jiang and Chaorui Deng and Yang Zhao and Dong Liu and Yadong Mu and 
           Mingkui Tan and Xinggang Wang and Wenyu Liu and Bin Xiao},
-  journal   = {TPAMI},
+  journal={TPAMI},
   year={2019}
 }
 
 @article{YuanCW19,
   title={Object-Contextual Representations for Semantic Segmentation},
-  author={Yuan, Yuhui and Chen, Xilin and Wang, Jingdong},
-  booktitle = {ECCV},
+  author={Yuhui Yuan and Xilin Chen and Jingdong Wang},
+  booktitle={ECCV},
   year={2020}
 }
 ````