Bump rules_java to 8.6.0 #244

Job	Run time
build (ubuntu-latest, true)	1m 44s
build (ubuntu-latest, false)	2m 22s
integration-tests (ubuntu-latest, 7.4.1, true)	3m 14s
build (windows-2022, true)	14s
integration-tests (ubuntu-latest, 7.4.1, false)	2m 53s
build (windows-2022, false)	13s
integration-tests (ubuntu-latest, 8.0.0rc4, true)	3m 18s
build (macos-13, true)	5m 46s
integration-tests (ubuntu-latest, 8.0.0rc4, false)	3m 18s
build (macos-13, false)	6m 53s
integration-tests (windows-2022, 7.4.1, true)	14s
integration-tests (windows-2022, 7.4.1, false)	14s
integration-tests (windows-2022, 8.0.0rc4, true)	19s
integration-tests (windows-2022, 8.0.0rc4, false)	15s
integration-tests (macos-13, 7.4.1, true)	9m 6s
integration-tests (macos-13, 7.4.1, false)	5m 14s
integration-tests (macos-13, 8.0.0rc4, true)	5m 48s
integration-tests (macos-13, 8.0.0rc4, false)	6m 32s
	57m 37s

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