Bump actions/upload-artifact from 3 to 4 (#1622) #1982

Job	Run time
conformance	4m 13s
build (2_12, mima)	1m 16s
build (2_12, e2e)	5s
build (2_12, test)	12m 30s
build (2_13, mima)	1m 22s
build (2_13, e2e)	8s
build (2_13, test)	9m 35s
build (3, mima)	4s
build (3, e2e)	4s
build (3, test)	9m 24s
build (2_12, examples_and_formatting)	2m 58s
build (2_13, scala3_compat_test)	9m 4s
build (3, scala3_compat_test)	9m 25s
ci-passed	1s
	1h 0m 9s

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