fix copy and paste fail

Author: brandonaaron

README.markdown

@@ -19,6 +19,6 @@ Here is an example of using both the bind and helper method syntax.
 
 ## License
 
-The expandable plugin is licensed under the MIT License (LICENSE.txt).
+This plugin is licensed under the MIT License (LICENSE.txt).
 
 Copyright (c) 2011 [Brandon Aaron](http://brandonaaron.net)