update

README.md

@@ -30,7 +30,8 @@ English | [简体中文](README_zh-CN.md)
 
 ## Highlights
 
-The new v1.x version has been released, which is adapted to the preview version of upstream codebase, please **align the version** when using it.
+The MMDeploy 1.x has been released, which is adapted to upstream codebases from OpenMMLab 2.0. Please **align the version** when using it.
+The default branch has been switched to `main` from `master`. MMDeploy 0.x (`master`) will be deprecated and new features will only be add to MMDeploy 1.x (`main`) in future.
 
 | mmdeploy | mmengine |  mmcv  | mmdet  | others |
 | :------: | :------: | :----: | :----: | :----: |

README_zh-CN.md

@@ -28,9 +28,10 @@
 
 [English](README.md) | 简体中文
 
-## 1.x 预览版本
+## MMDeploy 1.x 版本
 
-全新的 v1.x 版本已发布，针对上游算法预览版做适配，使用时务必**对齐版本**。
+全新的 MMDeploy 1.x 已发布，该版本适配OpenMMLab 2.0生态体系，使用时务必**对齐版本**。
+MMDeploy 代码库默认分支从`master`切换至`main`。 MMDeploy 0.x (`master`)将逐步废弃，新特性将只添加到 MMDeploy 1.x (`main`)。
 
 | mmdeploy | mmengine |  mmcv  | mmdet  | others |
 | :------: | :------: | :----: | :----: | :----: |