ci: publish supergraph chart every update #41

Job	Run time
helm_lint / lint	15s
lint_commits / lint_commits	13s
docs / lint	11s
compose_workflow / compose	14s
supergraph_generate / generate	5s
update_workflow / update	15s
docs / build	18s
supergraph_publish / publish	12s
docs / publish_gh_pages	10s
	1m 53s

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