chore: update readme

Author: warmthsea

README.md

@@ -6,3 +6,6 @@ Sandbox demo fork of vitesse-lite.
 #### Try it with code sandbox
 
 [![Edit element-plus](https://codesandbox.io/static/img/play-codesandbox.svg)](https://codesandbox.io/p/github/element-plus/element-plus-demo/main)
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+<img width="2560" height="1271" alt="image" src="https://github.com/user-attachments/assets/940f84cf-8e86-447e-ba8e-0401868a8071" />