Bump actions/download-artifact from 5 to 6 #5874

Job	Run time
build_windows (3.14)	51m 50s
build_windows (3.11)	43m 37s
build_linux (3.14)	35m 23s
build_windows (3.12)	41m 33s
build_linux (3.12)	34m 56s
build_windows (3.13)	43m 54s
build_windows (3.10)	45m 3s
build_linux (3.13)	35m 18s
build_linux (3.11)	34m 58s
build_linux (3.10)	35m 35s
array-api-conformity (3.10, false, ubuntu-22.04)	6m 7s
test_examples_linux (3.11, false, ubuntu-22.04)	8m 17s
test_linux (3.11, false, ubuntu-22.04)	10m 14s
test_linux (3.12, false, ubuntu-22.04)	10m 42s
test_linux (3.14, false, ubuntu-22.04)	17m 37s
test_linux (3.10, false, ubuntu-22.04)	10m 13s
test_linux (3.13, false, ubuntu-22.04)	10m 18s
test_windows (3.10, false, windows-latest)	12m 58s
test_windows (3.13, false, windows-latest)	12m 41s
test_windows (3.11, false, windows-latest)	16m 17s
test_windows (3.14, false, windows-latest)	18m 0s
test_windows (3.12, false, windows-latest)	14m 29s
upload_linux	0s
upload_windows	0s
Clean up anaconda packages	0s
	9h 10m 0s

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