test

Bump ruby/setup-ruby from 1.218.0 to 1.221.0 #632

Job	Run time
ruby-versions / Generate Ruby versions	2s
test (ubuntu-latest, 2.3)	41s
test (ubuntu-latest, 2.4)	41s
test (ubuntu-latest, 2.5)	41s
test (ubuntu-latest, 2.6)	46s
test (ubuntu-latest, 2.7)	44s
test (ubuntu-latest, 3.0)	16s
test (ubuntu-latest, 3.1)	15s
test (ubuntu-latest, 3.2)	16s
test (ubuntu-latest, 3.3)	19s
test (ubuntu-latest, 3.4)	16s
test (ubuntu-latest, head)	16s
test (ubuntu-latest, jruby)	4m 0s
test (ubuntu-latest, jruby-head)	4m 4s
test (ubuntu-latest, truffleruby)	50s
test (windows-latest, 2.3)	1m 49s
test (windows-latest, 2.4)	2m 46s
test (windows-latest, 2.5)	4m 8s
test (windows-latest, 2.6)	3m 34s
test (windows-latest, 2.7)	4m 18s
test (windows-latest, 3.0)	1m 50s
test (windows-latest, 3.1)	1m 56s
test (windows-latest, 3.2)	1m 25s
test (windows-latest, 3.3)	1m 18s
test (windows-latest, 3.4)	1m 55s
test (windows-latest, head)	1m 26s
	40m 32s

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