ci: bump `actions/upload-artifact` to `v4` #2477

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Run time

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Job	Run time
Build no_std	2m 12s
Check crates (MSRV)	26m 24s
Check bindings	8m 26s
Check crates	25m 33s
Check docs	6m 51s
Format	12s
	1h 9m 38s