GitLab

We've started migrating the bug tickets from Launchpad to GitLab, so
it does not make too much sense anymore that users open new tickets
in the old system. Let's direct them now to the GitLab tracker instead.

Message-Id: <20210503103007.1034171-1-thuth@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>