Update grpc submodule to support GetRewardPeriodInfo. #1085

Job	Run time
counter cargo:test	1m 55s
wasm-transform cargo:test	2m 52s
wasm-chain-integration cargo:test	22m 54s
smart-contracts/escrow lint:clippy	1m 50s
smart-contracts/lockup lint:clippy	1m 52s
smart-contracts/use-all-host-functions lint:clippy	1m 50s
smart-contracts/rate-limited lint:clippy	1m 56s
smart-contracts/counter lint:clippy	2m 14s
smart-contracts/context-test lint:clippy	2m 9s
smart-contracts/fib lint:clippy	2m 15s
smart-contracts/wasm-transform lint:clippy	2m 7s
smart-contracts/wasm-chain-integration lint:clippy	2m 36s
smart-contracts/wasm-chain-integration lint:clippy	3m 27s
smart-contracts/wasm-chain-integration lint:clippy	2m 29s
smart-contracts/wasm-transform lint:fmt	15s
smart-contracts/wasm-chain-integration lint:fmt	17s
smart-contracts/wasm-transform lint:fmt	2m 9s
smart-contracts/wasm-chain-integration lint:fmt	3m 8s
escrow lint:fmt	27s
lockup lint:fmt	20s
use-all-host-functions lint:fmt	22s
rate-limited lint:fmt	26s
counter lint:fmt	22s
context-test lint:fmt	24s
fib lint:fmt	27s
wasm-core-spec cargo:test	2m 32s
Ensure consistency between wat and wasm files	16s
	1h 3m 51s

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