fix optional column title #21651

Job	Run time
branch_meta	1s
build_and_push	4m 27s
trivy-vulnerability-scanning	47s
end-to-end-tests / e2e (courses_and_topics)	5m 3s
end-to-end-tests / e2e (management)	5m 49s
deploy / create_artifacts_repos (schulcloud-server)	1m 5s
end-to-end-tests / e2e (navi_user_settings)	7m 0s
end-to-end-tests / e2e (tasks_and_other)	8m 37s
deploy / create_artifacts_repos (schulcloud-client)	13s
deploy / create_artifacts_repos (nuxt-client)	17s
deploy / create_artifacts_repos (superhero-dashboard)	6s
deploy / create_artifacts_repos (schulcloud-calendar)	6s
deploy / create_artifacts_repos (antivirus_check_service)	5s
deploy / create_artifacts_repos (version-aggregator)	3s
deploy / create_artifacts_repos (dof_app_deploy)	3s
deploy / create_artifacts_repos (h5p-staticfiles-server)	3s
deploy / create_artifacts_repos (tldraw-client)	5s
deploy / create_branch_identifier / convert_branch_name	1s
deploy / create_artifacts_workspaces (brb)	5s
deploy / create_artifacts_workspaces (dbc)	2s
deploy / create_artifacts_workspaces (nbc)	4s
deploy / create_artifacts_workspaces (thr)	2s
deploy / gather-namespace-activation-facts	1s
deploy / deploy_nbc_dev / deploy nbc	11m 38s
deploy / deploy_brb_dev / deploy brb	10m 54s
deploy / deploy_dbc_dev / deploy dbc	11m 3s
deploy / deploy_thr_dev / deploy thr	5m 10s
deploy / call-activator (dbc)	2s
deploy / call-activator (brb)	3s
deploy / call-activator (nbc)	4s
deploy / call-activator (thr)	2s
test-successful	1s
cy-e2e-tests	0s
deploy-successful	0s
	1h 13m 2s

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