Added documentation badge

Author: LineIndent

README.md

@@ -126,7 +126,7 @@ That's it! You now have access to Flet Material library components!!
 
 ## Contributing
 
-Contributions are highly encouraged and welcomed. 
+Contributions are highly encouraged and welcomed. Check out the [contributon section](https://flet-material.vercel.app/contribute/) of the documentation for more details. 
 
 
 ## License