build(deps): bump actions/download-artifact from 3 to 4 #608

Job	Run time
Check DockerHub secrets exist	1s
test (debos-arch)	1m 8s
test (debos-bookworm)	52s
test (debos-bullseye)	53s
test (debos-trixie)	58s
Build Docker container	3m 17s
recipes on nofakemachine	33s
Run unit tests	2m 1s
escaping on nofakemachine	46s
debian (amd64) on nofakemachine	2m 1s
debian (arm64) on nofakemachine	2m 7s
debian (armhf) on nofakemachine	2m 12s
recipes on qemu	46s
escaping on qemu	41s
debian (amd64) on qemu	5m 5s
debian (arm64) on qemu	33m 25s
debian (armhf) on qemu	36m 58s
recipes on uml	45s
escaping on uml	43s
debian (amd64) on uml	5m 4s
debian (arm64) on uml	10m 7s
debian (armhf) on uml	18m 3s
arch on arch	8m 36s
partitioning on qemu	52s
apertis on uml	8m 21s
partitioning on uml	46s
Publish to GHCR	2m 23s
allgreen	8s
Publish to DockerHub	2m 41s
	2h 32m 13s

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