Bump v0.21.1 (#1273)

* Bump v0.21.1

* add improvements in changelog

* add improvements in changelog

* fix cn readme

* change changelog

README.md

@@ -66,7 +66,7 @@ This project is released under the [Apache 2.0 license](LICENSE).
 
 ## Changelog
 
-v0.21.0 was released in 1/29/2022.
+v0.21.0 was released in 2/9/2022.
 Please refer to [changelog.md](docs/en/changelog.md) for details and release history.
 
 ## Benchmark and model zoo

README_zh-CN.md

@@ -65,7 +65,7 @@ MMSegmentation 是一个基于 PyTorch 的语义分割开源工具箱。它是 O
 
 ## 更新日志
 
-最新的月度版本 v0.21.0 在 2022.1.29 发布。
+最新版本 v0.21.1 在 2022.2.9 发布。
 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/en/changelog.md)。
 
 ## 基准测试和模型库

docs/en/changelog.md

 ## Changelog
 
 
+### V0.21.1 (2/9/2022)
+
+**Bug Fixes**
+
+- Fix typos in docs. ([#1263](https://github.com/open-mmlab/mmsegmentation/pull/1263))
+- Fix repeating log by `setup_multi_processes`. ([#1267](https://github.com/open-mmlab/mmsegmentation/pull/1267))
+- Upgrade isort in pre-commit hook. ([#1270](https://github.com/open-mmlab/mmsegmentation/pull/1270))
+
+**Improvements**
+
+- Use MMCV load_state_dict func in ViT/Swin. ([#1272](https://github.com/open-mmlab/mmsegmentation/pull/1272))
+- Add exception for PointRend for support CPU-only. ([#1271](https://github.com/open-mmlab/mmsegmentation/pull/1270))
+
 ### V0.21 (1/29/2022)
 
 **Highlights**

mmseg/version.py

 # Copyright (c) Open-MMLab. All rights reserved.
 
-__version__ = '0.21.0'
+__version__ = '0.21.1'
 
 
 def parse_version_info(version_str):