www/gitlab: security and patch update to 18.0.1

Changes: https://about.gitlab.com/releases/2025/05/21/patch-release-gitlab-18-0-1-released/
Security: a1a1b0c2-3791-11f0-8600-2cf05da270f3
(cherry picked from commit eef29875f4eb3f5443a5618893a44f6cdf1a42e2)