chore(ci): Don't pull zfs on latest. #913

Job	Run time
build / image (main, aurora, latest)	14m 0s
build / image (main, aurora-dx, latest)	15m 6s
build / image (nvidia, aurora, latest)	15m 4s
build / image (nvidia, aurora-dx, latest)	4m 52s
build / image (asus, aurora, latest)	40s
build / image (asus, aurora-dx, latest)	40s
build / image (asus-nvidia, aurora, latest)	41s
build / image (asus-nvidia, aurora-dx, latest)	1m 2s
build / image (surface, aurora, latest)	33s
build / image (surface, aurora-dx, latest)	31s
build / image (surface-nvidia, aurora, latest)	35s
build / image (surface-nvidia, aurora-dx, latest)	1m 4s
build / Check all aurora latest builds successful	4s
build / iso	1s
	54m 53s

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