docs: update node vesion icon

README.md

@@ -14,7 +14,7 @@
 [![star](https://gitee.com/codercup/unibest/badge/star.svg?theme=dark)](https://gitee.com/codercup/unibest/stargazers)
 [![GitHub forks](https://img.shields.io/github/forks/codercup/unibest?style=flat&logo=github)](https://github.com/codercup/unibest)
 [![fork](https://gitee.com/codercup/unibest/badge/fork.svg?theme=dark)](https://gitee.com/codercup/unibest/members)
-![node version](https://img.shields.io/badge/node-%3E%3D16-green)
+![node version](https://img.shields.io/badge/node-%3E%3D18-green)
 ![pnpm version](https://img.shields.io/badge/pnpm-%3E%3D7.30-green)
 ![GitHub package.json version (subfolder of monorepo)](https://img.shields.io/github/package-json/v/codercup/unibest)
 ![GitHub License](https://img.shields.io/github/license/codercup/unibest)