Add a workflow to sync commits to ruby/ruby (#143) #430

Job	Run time
ruby-versions / Generate Ruby versions	5s
windows-latest 2.7	2m 20s
windows-latest 3.1	3m 25s
windows-latest 3.2	1m 54s
windows-latest 3.0	1m 46s
windows-latest 3.4	2m 15s
windows-latest mingw	1m 26s
windows-latest 3.3	1m 44s
windows-latest mswin	1m 34s
windows-latest jruby-head	2m 36s
	19m 5s

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