www/gitlab-ce: fix build errors cause by dep upgrade

Several dep upgrade of rubgems port broke the gitlab-ce port.
The problem are reported by e.g.
https://beefy16.nyi.freebsd.org/data/131amd64-default/d20a3cf7e848/logs/gitlab-ce-15.3.4_1.log

and also by users.
PR: 266963