core: frontend: EthernetUpdater: Increase timeout #1671

Job	Run time
python-tests	2m 42s
frontend-tests	1m 8s
deploy-docker-images (bootstrap, blueos, linux/arm/v7,linux/arm64/v8,linux/amd64)	1m 37s
deploy-docker-images (core, blueos, linux/arm/v7,linux/arm64/v8,linux/amd64)	16m 50s
deploy-raspberry-image	0s
	22m 17s

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