fix c++ grpc onnx server

lyblsgo

2023-03-16 76164048454ef781c29be941d6cc3a2801a349b1

 funasr/punctuation/abs_model.py

@@ -25,3 +25,7 @@
    @abstractmethod
    def forward(self, input: torch.Tensor, hidden: torch.Tensor) -> Tuple[torch.Tensor, torch.Tensor]:
        raise NotImplementedError

    @abstractmethod
    def with_vad(self) -> bool:
        raise NotImplementedError