Bump actions/setup-java from 4 to 5 (#142) #487

Job	Run time
ruby-versions / Generate Ruby versions	4s
ubuntu-24.04 2.7	43s
ubuntu-24.04 3.3	20s
ubuntu-24.04 3.1	20s
ubuntu-24.04 debug	21s
ubuntu-24.04 3.2	17s
ubuntu-24.04 3.0	17s
ubuntu-24.04 3.4	21s
ubuntu-22.04 3.1	24s
ubuntu-22.04 2.7	42s
ubuntu-24.04 jruby-head	1m 9s
ubuntu-24.04 head	17s
ubuntu-22.04 3.3	22s
ubuntu-24.04 truffleruby-head	28s
ubuntu-22.04 debug	19s
ubuntu-22.04 truffleruby-head	20s
ubuntu-22.04 jruby-head	1m 1s
ubuntu-22.04 3.2	14s
ubuntu-22.04 3.0	11s
ubuntu-22.04 head	14s
ubuntu-22.04 3.4	22s
	8m 46s

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