fix: update Python version in README files to 3.6

Author: dongly

README.md

@@ -3,7 +3,7 @@
 # Python Scripts for RT-Thread Env
 
 [![License: GPL-2.0](https://img.shields.io/badge/License-GPL--2.0-blue.svg)](LICENSE)
-[![Python](https://img.shields.io/badge/Python-3.12+-green.svg)](https://www.python.org/)
+[![Python](https://img.shields.io/badge/Python-3.6+-green.svg)](https://www.python.org/)
 [![Platform](https://img.shields.io/badge/Platform-Windows%20%7C%20Linux%20%7C%20macOS-lightgrey.svg)]()
 
 **[简体中文](README_ZH.md) | English**

README_ZH.md

@@ -3,7 +3,7 @@
 # RT-Thread Env Python 脚本
 
 [![License: GPL-2.0](https://img.shields.io/badge/License-GPL--2.0-blue.svg)](LICENSE)
-[![Python](https://img.shields.io/badge/Python-3.12+-green.svg)](https://www.python.org/)
+[![Python](https://img.shields.io/badge/Python-3.6+-green.svg)](https://www.python.org/)
 [![Platform](https://img.shields.io/badge/Platform-Windows%20%7C%20Linux%20%7C%20macOS-lightgrey.svg)]()
 
 **[English](README.md) | 简体中文**