campaign bulkupload : changed xls to xlsx

@@ -857,7 +857,7 @@ class CampaignController extends Controller {
 
 
 			   $writer->save('php://output');*/
 			   $writer->save('php://output');*/
 
 
-			   $filepath = "assets/extras/campaignUserMappingFormat.xls";
+			   $filepath = "assets/extras/campaignUserMappingFormat.xlsx";
 			   return Response::download($filepath);
 			   return Response::download($filepath);
 		}
 		}