Update Bibtex (#368)

* Update README.md

* Update README_zh-CN.md

* Update README.md

README.md

@@ -84,7 +84,7 @@ Support methods
 - [x] [3DSSD (CVPR'2020)](configs/3dssd/README.md)
 - [x] [Part-A2 (TPAMI'2020)](configs/parta2/README.md)
 - [x] [MVXNet (ICRA'2019)](configs/mvxnet/README.md)
-- [x] [CenterPoint (Arxiv'2020)](configs/centerpoint/README.md)
+- [x] [CenterPoint (CVPR'2021)](configs/centerpoint/README.md)
 - [x] [SSN (ECCV'2020)](configs/ssn/README.md)
 
 |                    | ResNet   | ResNeXt  | SENet    |PointNet++ | HRNet | RegNetX | Res2Net |

README_zh-CN.md

@@ -83,7 +83,7 @@ MMDetection3D 是一个基于 PyTorch 的目标检测开源工具箱, 下一代
 - [x] [3DSSD (CVPR'2020)](configs/3dssd/README.md)
 - [x] [Part-A2 (TPAMI'2020)](configs/parta2/README.md)
 - [x] [MVXNet (ICRA'2019)](configs/mvxnet/README.md)
-- [x] [CenterPoint (Arxiv'2020)](configs/centerpoint/README.md)
+- [x] [CenterPoint (CVPR'2021)](configs/centerpoint/README.md)
 - [x] [SSN (ECCV'2020)](configs/ssn/README.md)
 
 |                    | ResNet   | ResNeXt  | SENet    |PointNet++ | HRNet | RegNetX | Res2Net |

configs/centerpoint/README.md

@@ -27,11 +27,11 @@ We follow the below style to name config files. Contributors are advised to foll
 
 `{dataset}`: dataset like nus-3d, kitti-3d, lyft-3d, scannet-3d, sunrgbd-3d. We also indicate the number of classes we are using if there exist multiple settings, e.g., kitti-3d-3class and kitti-3d-car means training on KITTI dataset with 3 classes and single class, respectively.
 ```
-@article{yin2020center,
-  title={Center-based 3d object detection and tracking},
+@article{yin2021center,
+  title={Center-based 3D Object Detection and Tracking},
   author={Yin, Tianwei and Zhou, Xingyi and Kr{\"a}henb{\"u}hl, Philipp},
-  journal={arXiv preprint arXiv:2006.11275},
-  year={2020}
+  journal={CVPR},
+  year={2021},
 }
 ```