Your Godot version:
4.0.1
Issue description:
Outdated project file. When I imported the provided project file "instancing.zip" I get the warning message that this project has been created in Godot version 3.x and needs to be converted to the newer version.
URL to the documentation page:
https://docs.godotengine.org/en/stable/getting_started/step_by_step/instancing.html
If you know how to fix the issue you are reporting please
consider opening a pull request. We provide a tutorial on
using git here: https://docs.godotengine.org/en/stable/community/contributing/pr_workflow.html,
writing documentation at https://docs.godotengine.org/en/stable/community/contributing/docs_writing_guidelines.html
and contributing to the class reference here: https://docs.godotengine.org/en/stable/community/contributing/updating_the_class_reference.html