Bump actions/upload-artifact from 4 to 5 #519

Job	Run time
ruby-versions / Generate Ruby versions	4s
ubuntu-24.04 2.7	48s
ubuntu-24.04 3.2	1m 0s
ubuntu-24.04 3.1	17s
ubuntu-24.04 3.0	11s
ubuntu-24.04 3.3	12s
ubuntu-24.04 3.4	14s
ubuntu-24.04 head	19s
ubuntu-24.04 debug	23s
ubuntu-22.04 3.1	17s
ubuntu-22.04 3.0	13s
ubuntu-24.04 truffleruby-head	23s
ubuntu-22.04 2.7	50s
ubuntu-22.04 3.2	21s
ubuntu-24.04 jruby-head	1m 8s
ubuntu-22.04 3.3	14s
ubuntu-22.04 debug	25s
ubuntu-22.04 jruby-head	1m 8s
ubuntu-22.04 truffleruby-head	32s
ubuntu-22.04 head	21s
ubuntu-22.04 3.4	21s
	9m 41s

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