Bump actions/upload-artifact from 3 to 4 #862

Job	Run time
Build source distributions	12s
Build x86_64 wheels on ubuntu-20.04	2m 17s
Build i686 wheels on ubuntu-20.04	2m 36s
Build manylinux_aarch64 wheels on ubuntu-20.04	2m 34s
Build musllinux_aarch64 wheels on ubuntu-20.04	2m 35s
Build manylinux_ppc64le wheels on ubuntu-20.04	2m 36s
Build musllinux_ppc64le wheels on ubuntu-20.04	2m 36s
Build manylinux_s390x wheels on ubuntu-20.04	2m 34s
Build musllinux_s390x wheels on ubuntu-20.04	2m 34s
Build AMD64 wheels on windows-2019	2m 20s
Build x86 wheels on windows-2019	2m 20s
Build x86_64 universal2 arm64 wheels on macos-11	2m 33s
Check dist	0s
Upload release to PyPI	0s
	27m 47s

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