Bump github.com/decred/dcrd/dcrec/secp256k1/v4 from 4.3.0 to 4.4.0 in /rmb-sdk-go #6028

Job	Run time
build-docker (activation-service)	28s
build (activation-service)	26s
build-docker (farmerbot)	16s
build (farmerbot)	26s
build-docker (grid-cli)	18s
build (grid-cli)	21s
build-docker (grid-proxy)	17s
build (grid-proxy)	31s
build-docker (gridify)	16s
build (gridify)	28s
build-docker (monitoring-bot)	18s
build (monitoring-bot)	27s
build-docker (user-contracts-mon)	34s
build (user-contracts-mon)	27s
build-docker (tfrobot)	18s
build (tfrobot)	29s
	6m 20s

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