chore: docs update (#41368)

* chore: docs update

* chore: docs update

docs/react/i18n.en-US.md

@@ -111,8 +111,8 @@ Do it step by step:
    ```bash
    git clone git@github.com:<your organization>/ant-design.git
    cd ant-design/
-   git remote add upstream origin git@github.com:ant-design/ant-design.git
-   git checkout -b <your new branch name>
+   git remote add upstream git@github.com:ant-design/ant-design.git
+   git checkout -b <your new branch name> upstream/feature
    ```
 
 2. Add the language support for [rc-picker](https://github.com/react-component/picker), for example [this](https://github.com/react-component/picker/blob/master/src/locale/en_US.ts).

docs/react/i18n.zh-CN.md

@@ -108,8 +108,8 @@ return (
    ```bash
    git clone git@github.com:<your organization>/ant-design.git
    cd ant-design/
-   git remote add upstream origin git@github.com:ant-design/ant-design.git
-   git checkout -b <your new branch name>
+   git remote add upstream git@github.com:ant-design/ant-design.git
+   git checkout -b <your new branch name> upstream/feature
    ```
 
 2. 为 [rc-picker](https://github.com/react-component/picker) 添加对应语言，参考 [这个](https://github.com/react-component/picker/blob/master/src/locale/en_US.ts)。