Update README wording for 'star' suggestion

Changed 'Star' to 'star' in both English and Chinese README files for consistency and improved readability.

README.en.md

@@ -975,7 +975,7 @@ This repository is licensed under the GPL-3.0 License - see the [LICENSE](LICENS
 
 <div align="center">
 
-**If this repository helps you, please consider giving it a ⭐ Star!**
+**If this repository helps you, please consider giving it a ⭐ star!**
 
 Made with ❤️ by [Xi Xu](https://xi-xu.me)
 

README.md

@@ -975,7 +975,7 @@ npx wrangler dev --log-level debug
 
 <div align="center">
 
-**如果这个存储库对您有帮助，请考虑给它一个 ⭐ Star！**
+**如果这个存储库对您有帮助，请考虑给它一个 ⭐ star！**
 
 Made with ❤️ by [Xi Xu](https://xi-xu.me)