fix(typo): fix \geq typo in readme (#445)

README.md

@@ -6,7 +6,7 @@
 
 <div align="center">
 
-[![Python 3.10](https://img.shields.io/badge/python-%3E%3D3.10-blue.svg)](https://www.python.org/downloads/release/python-3109/)
+[![Python 3.10](https://img.shields.io/badge/python-%E2%89%A53.10-blue)](https://www.python.org/downloads/release/python-3109/)
 [![GitHub pull request](https://img.shields.io/badge/PRs-welcome-orange)](https://github.com/hiyouga/LLaMA-Factory/pulls)
 [![pre-commit](https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit&logoColor=white)](https://pre-commit.com/)
 [![bear-ified](https://raw.githubusercontent.com/beartype/beartype-assets/main/badge/bear-ified.svg)](https://beartype.readthedocs.io)