Once again, the lab is hosted on GitHub Classrooms.
Go to the classroom.
Again, you will want to clone the repository to your local machine for editing. Do not download the zip, or download the raw file. Copy the URL and clone.
Start jupyter-lab in the directory of your cloned repository.
Follow through the steps of the lab.
When you are done, you need to commit the changes to the notebook and push the changes back to GitHub.
Consult the git guide as needed.