Change *_slot to *_port on get_connection_list

doc/classes/GraphEdit.xml

@@ -82,7 +82,7 @@
 			<return type="Array">
 			</return>
 			<description>
-				Return an Array containing the list of connections. A connection consists in a structure of the form {from_slot: 0, from: "GraphNode name 0", to_slot: 1, to: "GraphNode name 1" }
+				Return an Array containing the list of connections. A connection consists in a structure of the form {from_port: 0, from: "GraphNode name 0", to_port: 1, to: "GraphNode name 1" }
 			</description>
 		</method>
 		<method name="get_zoom_hbox">