whisper model to onnx exception

[kendiyang]

1.optimum-cli export onnx --model openai/whisper-small onnx_model/ --monolith
2.optimum-cli onnxruntime quantize --onnx_model onnx_model/ --arm64 -o quauntized_model/

E/OrtWhisper.kt: Error in getTranscription: Error code - ORT_NOT_IMPLEMENTED - message: Could not find an implementation for ConvInteger(10) node with name '/model/encoder/conv1/Conv_quant'
E/flutter ( 6184): [ERROR:flutter/runtime/dart_vm_initializer.cc(40)] Unhandled Exception: Exception: Transcript returned from platform code is null
E/flutter ( 6184): #0 WhisperNative._getTranscriptPlatformChannel (package:fonnx/models/whisper/whisper_native.dart:55:7)
E/flutter ( 6184):
E/flutter ( 6184): #1 SttService._whisperInferenceLoop.doIt (package:fonnx_example/stt_service.dart:270:23)
E/flutter ( 6184):
E/flutter ( 6184): #2 SttService._whisperInferenceLoop (package:fonnx_example/stt_service.dart:290:5)
E/flutter ( 6184):
E/flutter ( 6184):
Application finished.