publish: Update `upload-artifact` workflow to v4. #298

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Run time

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Job	Run time
python 3.8 tests	5m 54s
python 3.9 tests	6m 27s
python 3.10 tests	6m 50s
python 3.11 tests	6m 2s
python 3.12 tests	5m 26s
	30m 39s