Upgrade docs broken

In https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/update/8.1-to-8.2.md it states:

For GitLab Community Edition: sudo -u git -H git checkout 8-2-stable

This would be a good trick since there is no 8-2-stable branch on this repo. Did the branch not get tagged properly, or is this an error in the docs?