Bump actions/upload-artifact from 5.0.0 to 6.0.0 #1115

Job	Run time
run-test-suite (ubuntu-latest, 3.9, 9.4)	11m 48s
run-test-suite (ubuntu-latest, 3.13, latest)	10m 44s
run-test-suite (ubuntu-22.04, 3.7, 9.1)	9m 46s
run-test-suite (ubuntu-latest, 3.9, latest)	10m 22s
	42m 40s

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