fix CI. add `setup-sbt` action #62

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Run time

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Job	Run time
build (17, 2.12.20)	54s
build (17, 2.13.14)	47s
build (17, 3.3.3)	56s
build (21, 2.12.20)	57s
build (21, 2.13.14)	46s
build (21, 3.3.3)	50s
	5m 10s