fix onnx export bug

hnluo

2023-08-29 72b6c7735e44fff12c4a3d401deb98c59f16ab0f

 egs/wenetspeech/conformer/local/process_opus.py

@@ -65,7 +65,7 @@

            start = int(start_time_list[i] * sample_rate)
            end = int(end_time_list[i] * sample_rate)
            target_audio = waveform[:, start:end].transpose(0, 1).contiguous()
            target_audio = waveform[:, start:end]
            torchaudio.save(seg_wav_path, target_audio, sample_rate)

            fout.write("{} {}\n".format(utt_id, seg_wav_path))