Fix placement of subcatimages link (always at the bottom of the page)

.mw-category doesn't include the gallery (the link was in the middle),
but .mw-category-generated does.

modules/ext.relatedimages.subcatlink.js

@@ -10,7 +10,7 @@ $( function () {
 
 	var $widget = $( '<div>' )
 		.attr( 'class', 'mw-subcatimagesgallery' )
-		.appendTo( '.mw-category' );
+		.appendTo( '.mw-category-generated' );
 
 	var $loading = $( '<div>' )
 		.attr( 'class', 'mw-subcatimagesgallery-loading' )