omap.man: update bug link to use gitlab instead of bugzilla
bugzilla is read-only and no longer allows filing new bugs, so don't tell people to report bugs there
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
gitlab.freedesktop.org will be unavailable for up to a week starting March 16th, due to our ongoing infrastructure move. You can follow our planning tracker at https://gitlab.freedesktop.org/freedesktop/freedesktop/-/issues/2076
bugzilla is read-only and no longer allows filing new bugs, so don't tell people to report bugs there