Bump actions/download-artifact from 4 to 5 in /.github/workflows #1583

Job	Run time
configure	4s
bindir (windows-latest)	15s
default (ubuntu-latest)	4s
bindir (ubuntu-latest)	8s
bindir (macos-latest)	7s
default (windows-latest)	13s
default (macos-latest)	8s
nightly (windows-latest)	17s
nightly (macos-latest)	15s
version (windows-latest)	10s
path-suggestions (ubuntu-latest)	4s
nightly (ubuntu-latest)	12s
version (ubuntu-latest)	7s
path-suggestions (windows-latest)	11s
version (macos-latest)	8s
path-suggestions (macos-latest)	8s
	2m 31s

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