Listing a user in `glib.doap` is important for ensuring their access
rights are correct in GitLab (as they are synced from the DOAP file by a
sysadmin script).
When `CODEOWNERS` was written, we were assuming that GNOME’s GitLab
would get support for the `CODEOWNERS` feature in GitLab. Unfortunately,
that’s not happened, and it remains an enterprise-only feature.
As such, that means that listing a co-maintainer of GLib in `CODEOWNERS`
is not sufficient to grant them permissions to actually merge MRs or
triage issues. That means they can’t really do any co-maintaining.
So fix that by updating the DOAP from `CODEOWNERS`. This doesn’t change
the list of co-maintainers at all, or the amount of trust assumed of
anybody.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>