Bind SceneTree::set_quit_on_go_back() to gdscript

Fix #15189

scene/main/scene_tree.cpp

@@ -2126,6 +2126,7 @@ void SceneTree::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("has_group", "name"), &SceneTree::has_group);
 
 	ClassDB::bind_method(D_METHOD("set_auto_accept_quit", "enabled"), &SceneTree::set_auto_accept_quit);
+	ClassDB::bind_method(D_METHOD("set_quit_on_go_back", "enabled"), &SceneTree::set_quit_on_go_back);
 
 	ClassDB::bind_method(D_METHOD("set_debug_collisions_hint", "enable"), &SceneTree::set_debug_collisions_hint);
 	ClassDB::bind_method(D_METHOD("is_debugging_collisions_hint"), &SceneTree::is_debugging_collisions_hint);