Fix example configuration for custom GitLab CI nginx server config.
The key 'custom_gitlab_server_config' should be 'custom_gitlab_ci_server_config' in the template example.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
The key 'custom_gitlab_server_config' should be 'custom_gitlab_ci_server_config' in the template example.