test

Add a workflow to sync commits to ruby/ruby #571

Job	Run time
ruby-versions / Generate Ruby versions	5s
build (2.5 / windows-latest)	1m 27s
build (2.6 / ubuntu-latest)	21s
build (2.5 / ubuntu-latest)	20s
build (2.7 / ubuntu-latest)	23s
build (2.7 / macos-latest)	36s
build (3.1 / ubuntu-latest)	9s
build (3.0 / macos-latest)	9s
build (2.6 / windows-latest)	1m 44s
build (2.7 / windows-latest)	1m 26s
build (3.0 / ubuntu-latest)	8s
build (3.1 / windows-latest)	1m 34s
build (2.6 / macos-latest)	28s
build (3.4 / macos-latest)	11s
build (3.2 / ubuntu-latest)	7s
build (3.1 / macos-latest)	8s
build (3.3 / windows-latest)	1m 6s
build (3.4 / windows-latest)	1m 6s
build (3.4 / ubuntu-latest)	16s
build (3.3 / macos-latest)	10s
build (3.0 / windows-latest)	59s
build (jruby-head / ubuntu-latest)	35s
build (3.3 / ubuntu-latest)	11s
build (truffleruby-head / macos-latest)	16s
build (head / ubuntu-latest)	7s
build (head / macos-latest)	13s
build (truffleruby / macos-latest)	19s
build (truffleruby / ubuntu-latest)	19s
build (3.2 / macos-latest)	9s
build (3.2 / windows-latest)	46s
build (head / windows-latest)	1m 2s
build (jruby / macos-latest)	30s
build (truffleruby-head / ubuntu-latest)	14s
build (jruby / ubuntu-latest)	29s
build (jruby-head / macos-latest)	27s
	18m 30s

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