Bump actions/download-artifact from 3 to 4 #120

Job	Run time
macos	1m 46s
musllinux (x86_64-unknown-linux-musl)	1m 0s
linux-cross (aarch64)	3m 45s
musllinux (i686-unknown-linux-musl)	1m 2s
linux (x86_64)	1m 9s
musllinux-cross (aarch64-unknown-linux-musl, aarch64)	1m 17s
linux (i686)	1m 12s
linux-cross (armv7)	4m 8s
windows (x64)	1m 27s
linux-cross (s390x)	3m 33s
windows (x86)	1m 11s
linux-cross (ppc64le)	4m 44s
musllinux-cross (armv7-unknown-linux-musleabihf, armv7)	1m 19s
linux-cross (ppc64)	1m 45s
Release	0s
	29m 18s

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