www/gitlab-ce: Security update to 15.2.3

Changelog:
https://about.gitlab.com/releases/2022/08/22/critical-security-release-gitlab-15-3-1-released/

MFH: 2022Q3
Security: 8a0cd618-22a0-11ed-b1e7-001b217b3468
(cherry picked from commit e00136d749a54c6382d60a1b0c7b6796a83b417d)