Update gradle/gradle-build-action digest to 842c587 #630

Job	Run time
integration-test (community-6.1.2-ga)	3m 58s
test	1m 53s
integration-test (community-6.2.0-ga)	5m 4s
integration-test (community-7.0.0)	3m 55s
integration-test (community-7.1.1)	4m 44s
integration-test (community-7.2.0)	4m 7s
integration-test (community-7.3.0)	3m 31s
integration-test (community-7.4.0)	4m 12s
integration-test (enterprise-6.1.1)	4m 15s
integration-test (enterprise-6.2.2)	4m 3s
integration-test (enterprise-7.0.1)	4m 19s
integration-test (enterprise-7.1.0)	5m 25s
integration-test (enterprise-7.2.0)	4m 19s
integration-test (enterprise-7.3.0)	4m 9s
integration-test (enterprise-7.4.0)	4m 22s
publish	0s
	1h 2m 16s

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