www/gitlab-ce: security update to 16.0.3

Changelog:
https://about.gitlab.com/releases/2023/06/05/security-release-gitlab-16-0-2-released/
://about.gitlab.com/releases/2023/06/07/gitlab-16-0-3-released/

Security: cdb5338d-04ec-11ee-9c88-001b217b3468