Update README.md

Author: CodeWithDennis

README.md

@@ -7,7 +7,7 @@
 This package offers a straightforward and easy-to-use alert component for your Filament application. It allows you to quickly implement customizable alert messages, enhancing the user experience by
 providing clear and concise notifications.
 
-![Simple Alert](https://github.com/CodeWithDennis/filament-simple-alert/raw/main/resources/screenshots/thumbnail.png)
+![Simple Alert](https://github.com/CodeWithDennis/filament-simple-alert/raw/4.x/resources/screenshots/thumbnail.png)
 
 ## Installation