Bump actions/download-artifact from 3 to 4 #359

Job	Run time
release_default / Load build targets	6s
release_sdist_only / Load build targets	0s
release / Load build targets	4s
release_sdist_only / Build ${{ matrix.target }} wheels	0s
release_sdist_only / Build source distribution	0s
release_sdist_only / Upload	0s
release / Build source distribution	35s
release / Build linux wheels	8m 19s
release / Build cp38-macosx_x86_64 wheels	1m 3s
release / Build cp39-macosx_arm64 wheels	1m 5s
release / Build cp3?-win_amd64 wheels	4m 13s
release / Build cp39-manylinux_aarch64 wheels	2m 36s
release_default / Build linux wheels	8m 13s
release_default / Build source distribution	34s
release_default / Build macos wheels	6m 1s
release_default / Build windows wheels	14m 19s
release / Upload	0s
release_default / Upload	0s
	47m 8s

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