Update dependabot-automerge.yml for rust crate bump #471

Job	Run time
docker-master	1h 39m 46s
publish-standalone-dry-run	20s
test-standalone (master, dev, default)	57s
build-js-of-ocaml (master, 4.11.1)	14m 5s
generated-files (master)	40s
standalone-haskell (master)	54m 33s
build-wasm-of-ocaml (master, 4.14.1)	14m 57s
validate-docker-master	37m 31s
test-amd64	2h 20m 47s
deploy-js-wasm-of-ocaml	34s
docker-check-all	3s
	6h 4m 13s

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