`change_scene` and `change_scene_to` have been renamed

[Jayman2000]

trafficstars

Your Godot version: v4.0.alpha.custom_build [d2a6a187f]

Issue description: Now that godotengine/godot#63596 is merged, change_scene needs to be replaced with change_scene_to_file and change_scene_to needs to be replaced with change_scene_to_packed.

URL to the documentation page: https://docs.godotengine.org/en/latest/tutorials/scripting/scene_tree.html?highlight=change_scene#changing-current-scene

[PastelDeFeira]

made a pr