Chore(deps): Bump actions/download-artifact from 5 to 6 #4745

Job	Run time
site (Java 17)	8m 39s
build-only (Java 17)	2m 44s
build-and-test Bridged (Java 17)	12m 25s
test Java 11 (no-build)	1m 6s
test (ubuntu, Java 17)	12m 39s
test (ubuntu, Java 21)	12m 18s
test (windows, Java 21)	11m 26s
test (windows, Java 17)	10m 58s
codecov-upload (Upload to codecov.io)	9s
	1h 12m 24s

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