fix extracting channelId #15652

Job	Run time
branch_meta	1s
build_and_push	3m 25s
trivy-vulnerability-scanning	40s
deploy / create_artifacts_repos (schulcloud-server)	36s
end-to-end-tests / e2e (courses_and_topics)	4m 51s
deploy / create_artifacts_repos (schulcloud-client)	12s
deploy / create_artifacts_repos (nuxt-client)	15s
end-to-end-tests / e2e (management)	5m 26s
deploy / create_artifacts_repos (superhero-dashboard)	7s
end-to-end-tests / e2e (navi_user_settings)	5m 35s
deploy / create_artifacts_repos (schulcloud-calendar)	7s
end-to-end-tests / e2e (tasks_and_other)	5m 26s
deploy / create_artifacts_repos (antivirus_check_service)	7s
deploy / create_artifacts_repos (version-aggregator)	5s
deploy / create_artifacts_repos (dof_app_deploy)	6s
deploy / create_artifacts_repos (h5p-staticfiles-server)	4s
deploy / create_branch_identifier / convert_branch_name	1s
deploy / create_artifacts_repos (tldraw-client)	4s
test-successful	3s
deploy / create_artifacts_workspaces	0s
deploy / bingo_add_branch	0s
deploy / deploy_dbc_dev	0s
deploy / deploy_brb_dev	0s
deploy / deploy_nbc_dev	0s
cy-e2e-tests	0s
deploy-successful	0s
	27m 11s

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