Fix broken URL in Ultimate Git Guide blog post (!47218) · Merge requests · GitLab.com / www-gitlab-com · GitLab

Why is this change being made?

Reported on our forums: https://forum.gitlab.com/t/broken-link-in-blog-post/36623

Does this MR meet the acceptance criteria?

Assign to DRI

Did you assign this change to the correct DRI of the page or information you are changing?

Conformity

Added description to this MR explaining the reasons for the proposed change, per say-why-not-just-what