Bump actions/download-artifact from 6 to 7 #5955

Job	Run time
build_linux (3.11)	31m 59s
build_linux (3.13)	29m 26s
build_linux (3.10)	30m 32s
build_windows (3.14)	45m 8s
build_windows (3.11)	44m 11s
build_windows (3.13)	44m 18s
build_linux (3.14)	30m 11s
build_windows (3.10)	46m 38s
build_linux (3.12)	32m 41s
build_windows (3.12)	47m 22s
array-api-conformity (3.10, false, ubuntu-22.04)	5m 26s
test_linux (3.14, false, ubuntu-22.04)	10m 55s
test_examples_linux (3.11, false, ubuntu-22.04)	8m 45s
test_linux (3.10, false, ubuntu-22.04)	10m 47s
test_linux (3.11, false, ubuntu-22.04)	10m 24s
test_linux (3.13, false, ubuntu-22.04)	10m 46s
test_linux (3.12, false, ubuntu-22.04)	9m 43s
upload_linux	0s
test_windows (3.10, false, windows-latest)	13m 3s
test_windows (3.11, false, windows-latest)	14m 44s
test_windows (3.12, false, windows-latest)	15m 19s
test_windows (3.13, false, windows-latest)	14m 3s
test_windows (3.14, false, windows-latest)	14m 46s
upload_windows	0s
Clean up anaconda packages	0s
	8h 41m 7s

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