Update README.md

Author: R00t-Shell

README.md

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 This advanced PHP-based webshell allows you to execute system commands and upload files to your server. With its user-friendly interface and powerful features, it simplifies system administration tasks.
 
-![Command Execution](Demo1.png)
+![Command Execution](https://raw.githubusercontent.com/RootShelll/Simple-WebShell/refs/heads/main/Demo1.png)
 *Real-time execution of system commands*
 
 ## ✨ Features