publish: Update `upload-artifact` workflow to v4. #297

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Run time

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Job	Run time
python 3.8 tests	7m 30s
python 3.9 tests	8m 9s
python 3.10 tests	7m 28s
python 3.11 tests	8m 35s
python 3.12 tests	8m 24s
	40m 6s