Update README.md

Author: irfaardy

README.md

@@ -12,4 +12,6 @@
    		'Rare ITEM 2' => 29.4,// 29.4% chance
    		'SSR ITEM' => 0.3,// 0.3% chance
    		'SSR ITEM' => 0.3,]);
-    
+		
+<h3>Contribute</h3>    
+If you want to contribute this project and make it better, your help is very welcome.