docs: update README.md

Author: chenjiahan

README.md

@@ -12,6 +12,8 @@ This plugin tries to find incompatible syntax in the output files with the curre
   <a href="https://npmcharts.com/compare/@rsbuild/plugin-check-syntax?minimal=true"><img src="https://img.shields.io/npm/dm/@rsbuild/plugin-check-syntax.svg?style=flat-square&colorA=564341&colorB=EDED91" alt="downloads" /></a>
 </p>
 
+![image](https://github.com/user-attachments/assets/9a639d60-2f44-4bc4-ac27-808568fa3842)
+
 ## Usage
 
 Install: