docs: 更新徽章

README.md

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-# ocs 网课助手
+<div style="text-align: center;">
+
+# OCS 网课助手
 
 > OCS (Online Course Script) 网课刷课脚本，帮助大学生解决网课难题
 
+![GitHub Repo stars](https://img.shields.io/github/stars/enncy/online-course-script?style=flat-square)
+![npm](https://img.shields.io/npm/v/ocsjs?color=red&style=flat-square)
+![jsDelivr hits (npm)](https://img.shields.io/jsdelivr/npm/hd/ocsjs?color=%23ff5627&label=jsDelivr&logoColor=%23555555&style=flat-square)
+![NPM](https://img.shields.io/npm/l/ocsjs?style=flat-square)
+![npm bundle size](https://img.shields.io/bundlephobia/min/ocsjs?style=flat-square)
+
+</div>
+
 # 关于
 
 -   [使用方法](https://enncy.github.io/online-course-script)