www/gitlab: security and patch update to 18.11.1
Changes: https://docs.gitlab.com/releases/patches/patch-release-gitlab-18-11-1-released/
Security: 73b927a6-3ecd-11f1-be20-2cf05da270f3
(cherry picked from commit 4f0eaf1f35f3f2f925c35ce5611e85d48a49ebe2)