Update SDK_tutorial_zh.md

zhifu gao

2023-07-03 a1dd7e96f53c873a1e4526b1faa4290bb323f281

 funasr/export/models/encoder/conformer_encoder.py

@@ -61,7 +61,6 @@
                speech: torch.Tensor,
                speech_lengths: torch.Tensor,
                ):
        speech = speech * self._output_size ** 0.5
        mask = self.make_pad_mask(speech_lengths)
        mask = self.prepare_mask(mask)
        if self.embed is None: