Update README.md

Author: cloud-oc

README.md

@@ -15,6 +15,8 @@
 
 [![](https://img.shields.io/badge/Cloud%3BBlog-white?style=for-the-badge)](https://www.cloud09.xyz/)
 <picture>
-  
+  <source media="(prefers-color-scheme: dark)" srcset="https://raw.githubusercontent.com/Cloud-OG/Cloud-OG/output/github-contribution-grid-snake-dark.svg" />
+  <source media="(prefers-color-scheme: light)" srcset="https://raw.githubusercontent.com/Cloud-OG/Cloud-OG/output/github-contribution-grid-snake.svg" />
+  <img width="100%" alt="github-snake" src="https://raw.githubusercontent.com/Cloud-OG/Cloud-OG/output/github-contribution-grid-snake.svg" />
 </picture>
 </div>