ci: bump actions/upload-artifact from 3 to 4 #248

Job	Run time
build_asan	2m 56s
build (ubuntu-latest, 3.12.0, false)	45s
build (ubuntu-latest, 3.12.0, true)	31s
build (ubuntu-latest, 3.11.6, false)	25s
build (ubuntu-latest, 3.11.6, true)	24s
build (ubuntu-latest, 3.10.11, false)	25s
build (ubuntu-latest, 3.10.11, true)	24s
build (ubuntu-latest, 3.8.17, false)	20s
build (ubuntu-latest, 3.8.17, true)	19s
build (ubuntu-20.04, 3.6.8, false)	15s
build (ubuntu-20.04, 3.6.8, true)	17s
build (ubuntu-latest, pypy-3.7, false)	1m 1s
build (ubuntu-latest, pypy-3.7, true)	25s
build (macos-latest, 3.12.0, false)	1m 9s
build (macos-latest, 3.11.6, false)	1m 9s
build (macos-latest, 3.10.11, false)	46s
build (macos-latest, 3.8.17, false)	43s
build (macos-latest, 3.6.8, false)	39s
build (macos-latest, pypy-3.7, false)	38s
build (windows-latest, 3.12.0, false)	2m 31s
build (windows-latest, 3.11.6, false)	2m 48s
build (windows-latest, 3.10.11, false)	1m 35s
build (windows-latest, 3.8.10, false)	1m 37s
build (windows-latest, 3.6.8, false)	1m 44s
build (windows-latest, pypy-3.7, false)	1m 36s
	25m 22s

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