Slight modifications to operators notebooks
Should be dealt with after !77 (closed): solution to the exercises have been updated to follow the last provided solution there.
GitLab upgrade completed. Current version is 18.6.4
https://about.gitlab.com/releases/2025/11/20/gitlab-18-6-released/
Should be dealt with after !77 (closed): solution to the exercises have been updated to follow the last provided solution there.