deps(windows-agent): bump google.golang.org/grpc from 1.69.2 to 1.69.4 in /windows-agent #4289

Job	Run time
C++ Quality Checks	1m 8s
Flutter integration tests (windows)	8m 0s
Flutter Quality checks (ubuntu, p4w_ms_store)	2m 21s
Flutter Quality checks (ubuntu, ubuntupro)	3m 33s
Go Quality checks (ubuntu, agentapi)	2m 9s
Flutter Quality checks (windows, p4w_ms_store)	2m 39s
Flutter Quality checks (windows, ubuntupro)	5m 50s
Go Quality checks (ubuntu, contractsapi)	1m 27s
Run Go tests with mocks (ubuntu, windows-agent)	7m 57s
Run Go tests with mocks (ubuntu, wsl-pro-service)	4m 11s
Go Quality checks (ubuntu, mocks)	1m 37s
Run Go tests with mocks (ubuntu, common)	2m 22s
Go Quality checks (ubuntu, storeapi/go-wrapper/microsoftstore)	1m 41s
Run Go tests with mocks (windows, storeapi/go-wrapper/microsoftstore)	3m 8s
Go Quality checks (ubuntu, windows-agent)	1m 59s
Run Go tests with mocks (windows, windows-agent)	6m 18s
Go Quality checks (ubuntu, wsl-pro-service)	1m 49s
Run Go tests with mocks (windows, common)	1m 58s
Go Quality checks (ubuntu, common)	1m 44s
Go Quality checks (windows, agentapi)	6m 21s
Go Quality checks (windows, contractsapi)	4m 25s
Go Quality checks (windows, mocks)	3m 56s
Go Quality checks (windows, storeapi/go-wrapper/microsoftstore)	4m 31s
Go Quality checks (windows, windows-agent)	4m 40s
Go Quality checks (windows, end-to-end)	4m 17s
Go Quality checks (windows, common)	4m 45s
	1h 34m 46s

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