got to https://gitlab.fusiondirectory.org/groups/fusiondirectory/-/milestones and create the new milestone
The branch should be named with the version of the release followed by -fixes.
ex: 1.2 is released the fixes branch is 1.2-fixes
This operation have inside a ticket with the label release and with a MR
Changelog.md, Authors, UPGRADE.md have to be merged into -dev after a release to ensure that the merge from the -dev to master will be easy.
git checkout 1.2.1-fixes -- Changelog.md