Bump actions/setup-java from 4.5.0 to 4.6.0 #776

Job	Run time
docker-master	1h 29m 32s
publish-standalone-dry-run	14s
test-standalone (master, dev, default)	1m 29s
validate-docker-master	2m 36s
build-js-of-ocaml (master, 4.11.1)	9m 22s
build-wasm-of-ocaml (master, 4.14.1)	20m 22s
generated-files (master)	23m 12s
standalone-haskell (master)	44m 5s
test-amd64	2h 21m 3s
deploy-js-wasm-of-ocaml	1m 24s
docker-check-all	1s
	5h 33m 20s

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