Bump actions/download-artifact from 4 to 6 (#1698) #3042

Job	Run time
build-x86_64-linux / Build x86_64 Linux (static)	1m 28s
build-aarch64-darwin / Build aarch64 Darwin (static)	2m 29s
build-aarch64-linux / Build aarch64 Linux (static)	1m 19s
build-x86_64-darwin / Build x86_64 Darwin (static)	2m 28s
Lints	2m 23s
Run x86_64 Darwin	5m 29s
Run x86_64 Darwin (--determinate)	4m 19s
Run x86_64 Linux (--determinate)	2m 51s
Run x86_64 Linux	2m 48s
Run x86_64 Linux (No init, --determinate)	1m 39s
Run aarch64 Linux	1m 57s
Run aarch64 Linux (--determinate)	57s
Run x86_64 Linux (No init)	1m 38s
Run aarch64 Darwin (--determinate)	3m 33s
Run aarch64 Darwin	3m 45s
Run x86_64 Linux release check matrix	0s
Run x86_64 Linux release checks	0s
	39m 3s

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