www/gitlab: security and patch update to 18.10.1

Changes: https://about.gitlab.com/releases/2026/03/25/patch-release-gitlab-18-10-1-released/
Security: b933083e-2b2e-11f1-b60a-2cf05da270f3
(cherry picked from commit 934b6718bdf0e95f1829145317dd8f71fce8f7b3)