www/gitlab-ce: update to 15.9.3

Changelog:
https://about.gitlab.com/releases/2023/02/24/gitlab-15-9-1-released/
https://about.gitlab.com/releases/2023/03/02/security-release-gitlab-15-9-2-released/
https://about.gitlab.com/releases/2023/03/09/gitlab-15-9-3-released/
(cherry picked from commit cc3b23a77655c560b3bd7ce809df7ccf1c6ff5f5)