Refactor (ci): Use a `job_group_key` to group jobs #121

Job	Run time
build-3-17	2m 1s
test-nogitdiff	15s
build-3-15	1m 43s
build-3-12	1m 6s
publish-draft-release	0s
update-dockerhub-description	0s
update-draft-release	0s
	5m 5s

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