Add a note that the script property is part of the object class

doc/classes/Object.xml

@@ -27,6 +27,7 @@
 		The [code]in[/code] operator will evaluate to [code]true[/code] as long as the key exists, even if the value is [code]null[/code].
 		Objects also receive notifications. Notifications are a simple way to notify the object about different events, so they can all be handled together. See [method _notification].
 		[b]Note:[/b] Unlike references to a [RefCounted], references to an Object stored in a variable can become invalid without warning. Therefore, it's recommended to use [RefCounted] for data classes instead of [Object].
+		[b]Note:[/b] The [code]script[/code] property is not exposed like most properties, but it does have a setter and getter ([code]set_script()[/code] and [code]get_script()[/code]).
 	</description>
 	<tutorials>
 		<link title="When and how to avoid using nodes for everything">$DOCS_URL/tutorials/best_practices/node_alternatives.html</link>