Fix broken link to the GitLab user documentation
https://gitlab.tails.boum.org/help/user reffers to 404. Changing it to https://gitlab.tails.boum.org/help reffers to the help page.
Edited by intrigeri
https://gitlab.tails.boum.org/help/user reffers to 404. Changing it to https://gitlab.tails.boum.org/help reffers to the help page.