GraalVM smoke tests

Bump `ruby/setup-ruby` to version `1.206.0` #470

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Run time

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Job	Run time
build (ubuntu-20.04, native)	5m 13s
build (ubuntu-20.04, nio)	5m 6s
build (macos-13, native)	10m 35s
build (macos-13, nio)	9m 56s
build (windows-2022, nio)	6m 25s
	37m 15s