✅🚧 Add JRuby to CI #2727

Job	Run time
ruby-versions / Generate Ruby versions	6s
build (3.2 / macos-latest)	30s
build (3.2 / ubuntu-latest)	43s
build (3.3 / ubuntu-latest)	49s
build (3.2 / windows-latest)	2m 33s
build (3.3 / macos-latest)	29s
build (3.4 / ubuntu-latest)	48s
build (3.4 / macos-latest)	30s
build (3.3 / windows-latest)	2m 17s
build (truffleruby-head / ubuntu-latest)	1m 31s
build (3.4 / windows-latest)	2m 15s
build (jruby-head / ubuntu-latest)	1m 44s
build (head / macos-latest)	29s
build (head / windows-latest)	2m 11s
build (head / ubuntu-latest)	44s
	17m 39s

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