Bump ruby/setup-ruby from 1.155.0 to 1.156.0 #490

Job	Run time
ruby-versions / Generate Ruby versions	4s
test (3.0, ubuntu-latest)	31s
test (3.0, macos-latest)	51s
test (3.0, windows-latest)	2m 7s
test (3.1, ubuntu-latest)	32s
test (3.1, macos-latest)	33s
test (3.1, windows-latest)	3m 19s
test (3.2, ubuntu-latest)	27s
test (3.2, macos-latest)	45s
test (3.2, windows-latest)	3m 39s
test (head, ubuntu-latest)	45s
test (head, macos-latest)	52s
test (head, windows-latest)	2m 31s
test (jruby, ubuntu-latest)	2m 49s
test (jruby, macos-latest)	2m 57s
test (jruby-head, ubuntu-latest)	3m 0s
test (jruby-head, macos-latest)	3m 26s
test (truffleruby, ubuntu-latest)	5m 35s
test (truffleruby, macos-latest)	5m 2s
test (truffleruby-head, ubuntu-latest)	5m 11s
test (truffleruby-head, macos-latest)	6m 53s
	51m 49s

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