ci: missing concurrency checks #6218

Job	Run time
global-exps	10s
bake	25s
flavor	7s
docker-push	38s
images	5s
json	11s
labels	13s
multi-images	6s
output-env	16s
sep-tags ( )	6s
sep-tags (,)	11s
tag-match (\d.\d.\d, 0)	6s
tag-match (\d.\d, 0)	7s
tag-match (v(.*), 1)	12s
tag-schedule	5s
tag-schedule (cron-{{date 'YYYYMMDD'}})	5s
tag-schedule ({{date 'YYYYMMDD-HHmmss'}})	8s
tag-schedule (schedule)	9s
tag-semver (auto)	6s
tag-semver (true)	6s
tag-semver (false)	9s
	3m 41s

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