add thumbnail url #535

Job	Run time
branch_meta	1s
build_and_push	7m 33s
trivy-vulnerability-scanning	30s
deploy / create_artifacts_repos (schulcloud-server)	1m 3s
deploy / create_artifacts_repos (schulcloud-client)	11s
deploy / create_artifacts_repos (nuxt-client)	16s
deploy / create_artifacts_repos (superhero-dashboard)	4s
deploy / create_artifacts_repos (schulcloud-calendar)	4s
deploy / create_artifacts_repos (antivirus_check_service)	4s
deploy / create_artifacts_repos (version-aggregator)	5s
deploy / create_artifacts_repos (dof_app_deploy)	3s
deploy / create_artifacts_repos (h5p-staticfiles-server)	6s
deploy / create_artifacts_repos (tldraw-client)	6s
deploy / create_branch_identifier / convert_branch_name	1s
deploy / create_artifacts_workspaces (brb)	2s
deploy / create_artifacts_workspaces (dbc)	2s
deploy / create_artifacts_workspaces (nbc)	4s
deploy / create_artifacts_workspaces (thr)	5s
deploy / gather-namespace-activation-facts	5s
deploy / deploy_nbc_dev / deploy nbc	9m 17s
deploy / deploy_brb_dev / deploy brb	8m 37s
deploy / deploy_dbc_dev / deploy dbc	8m 31s
deploy / deploy_thr_dev / deploy thr	9m 5s
deploy / call-activator (dbc)	6m 16s
deploy / call-activator (brb)	6m 27s
deploy / call-activator (nbc)	6m 25s
deploy / call-activator (thr)	6m 38s
deploy-successful	0s
	1h 11m 41s

Provide feedback