fix comments

README.md

@@ -63,9 +63,7 @@ This project is released under the [Apache 2.0 license](LICENSE).
 **2.20.0** was released in 27/12/2021:
 
 - Support [TOOD](configs/tood/README.md): Task-aligned One-stage Object Detection (ICCV 2021 Oral)
-- Support selecting GPU-ids in non-distributed testing time
 - Support resuming from the latest checkpoint automatically
-- Fix some bugs in documentation, links and codes
 
 Please refer to [changelog.md](docs/en/changelog.md) for details and release history.
 

README_zh-CN.md

@@ -61,9 +61,7 @@ MMDetection 是一个基于 PyTorch 的目标检测开源工具箱。它是 [Ope
 
 最新的 **2.20.0** 版本已经在 2021.12.27 发布:
 - 支持了 ICCV 2021 Oral 方法 [TOOD](configs/tood/README.md): Task-aligned One-stage Object Detection
-- 支持了在非分布式测试时选择 GPU
 - 支持了自动从最新的存储参数节点恢复训练
-- 修复了一些文档、代码和链接上的问题
 
 如果想了解更多版本更新细节和历史信息，请阅读[更新日志](docs/changelog.md)。
 

docs/en/changelog.md

@@ -8,33 +8,26 @@
 - Support resuming from the latest checkpoint automatically (#6727)
 
 #### Bug Fixes
+
 - Fix yolox ci failed (#6864)
 - Fix wrong bbox loss_weight of the PAA head (#6744)
 - Fix the padding value of `gt_semantic_seg` in batch collating (#6837)
 - Fix test error of lvis when using `classwise` (#6845)
-- Avoid get_local_path bc-breaking (#6719)
-- Fix norm sync bug (#6852)
-- Cancel previous runs that are not completed in workflow (#6772)
+- Avoid BC-breaking of `get_local_path`  (#6719)
+- Fix bug in `sync_norm_hook` when the BN layer does not exist (#6852)
 - Use pycocotools directly no matter what platform it is (#6838)
 
 #### Improvements
+
 - Add unit test for SimOTA with no valid bbox (#6770)
 - Use precommit to check readme (#6802)
 - Support selecting GPU-ids in non-distributed testing time (#6781)
 
-#### Documents
-- Update docs/conf.py and docs_zh-CN/conf.py to use shared items (#6801)
-- Add MMRazor and MMSelfSup in readme (#6874)
-- Update comments in base detector (#6795)
-- Fix link (#6796)
-- Fix typo (#6865)
-
 #### Contributors
 
 A total of 12 developers contributed to this release.
 Thanks @ZwwWayne, @Czm369, @jshilong, @RangiLyu, @BIGWangYuDong, @hhaAndroid, @jamiechoi1995, @AronLin, @Keiku, @gkagkos, @fcakyon, @www516717402
 
-
 ### v2.19.1 (14/12/2021)
 
 #### New Features