transport: fix minor typo in 'GoAway' godoc (#1284)
transport: fix minor typo in 'GoAway' godoc (#1284)

Signed-off-by: Gyu-Ho Lee <3454051ee3341eb69bdf6fca40899cdad4d86496@gmail.com>
improbable-io/grpc-go,menghanl/grpc-go,fuchsia-mirror/third_party-grpc-grpc-go,MakMukhi/grpc-go,improbable-io/grpc-go,peter-edge/grpc-go,MakMukhi/grpc-go,fuchsia-mirror/third_party-grpc-grpc-go,thinkerou/grpc-go,grpc/grpc-go,stanley-cheung/grpc-go,peter-edge/grpc-go,dfawley/grpc-go,stanley-cheung/grpc-go,dfawley/grpc-go,rakyll/grpc-go,grpc/grpc-go,thinkerou/grpc-go,menghanl/grpc-go,rakyll/grpc-go