Since October 2020 the default branch for Github repositories is main instead of master. Since in the repo and articles there are a few links that rely on "master" this could cause confusion for new users since some things won't work as expected:
Perhaps these should be updated to main instead? However on gitlab.com the default branch still remains master so if someone creates the repo there they face the same issues. In any case, a comment in the article would be helpful too.