Update README.md

README.md

@@ -6,7 +6,8 @@
    
 <div align="center">
 
-[![Stars Count](https://img.shields.io/github/stars/sunface/rust-course?style=flat)](https://github.com/sunface/rust-course/stargazers) [![Forks Count](https://img.shields.io/github/forks/sunface/rust-course.svg?style=flat)](https://github.com/sunface/rust-course/graphs/contributors)
+[![Stars Count](https://img.shields.io/github/stars/sunface/rust-course?style=flat)](https://github.com/sunface/rust-course/stargazers) 
+[![](https://img.shields.io/github/issues-pr-closed-raw/sunface/rust-course.svg?style=flat)](https://github.com/sunface/rust-course/issues)
 <a href="https://www.zhihu.com/column/c_1452781034895446017">
   <img alt="Sunface | 知乎" height="20px" width="20px" src="https://github.com/sunface/rust-course/blob/main/assets/zhihu.jpg">
 </a>