docs(cn): add python2.7

Signed-off-by: 9547 <29431502+9547@users.noreply.github.com>

Author: 9547

README_CN.md

@@ -23,10 +23,9 @@
 
 **前置要求（必须）:**
 
+-   [Python 2.7+](https://www.python.org/downloads/)
 -   [Node.js 23+](https://docs.npmjs.com/downloading-and-installing-node-js-and-npm)
--   Nodejs安装
 -   [pnpm](https://pnpm.io/installation)
--   使用pnpm
 
 ### 编辑.env文件