Fix issue with heavy contention on TaskQueue updating concurrency lim… #2000

Job	Run time
typecheck / typecheck	3m 19s
units / 🧪 Unit Tests	1m 57s
publish-worker / build (coordinator)	2m 2s
publish-worker / build (docker-provider)	50s
publish-worker / build (kubernetes-provider)	42s
publish-webapp / publish	2m 53s
	11m 43s

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