Bump golang.org/x/crypto from 0.28.0 to 0.31.0 in /grid-client #5651

Job	Run time
build (activation-service)	24s
build (farmerbot)	51s
build-docker (activation-service)	42s
build (grid-cli)	27s
build-docker (farmerbot)	32s
build (grid-proxy)	36s
build-docker (grid-cli)	17s
build (gridify)	31s
build-docker (grid-proxy)	44s
build (monitoring-bot)	32s
build-docker (gridify)	1m 3s
build (user-contracts-mon)	21s
build-docker (monitoring-bot)	36s
build (tfrobot)	25s
build-docker (user-contracts-mon)	37s
build-docker (tfrobot)	19s
	8m 57s

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