(extract_sub_graph is deprecated and will be removed in a future version) Python API from_keras

[benquan]

Describe the bug
When running tf2onnx.convert.from_keras(model) I get the following warning:

WARNING:tensorflow:From /Users/ben/tensorflow/lib/python3.8/site-packages/tf2onnx/tf_loader.py:715: extract_sub_graph (from tensorflow.python.framework.graph_util_impl) is deprecated and will be removed in a future version.
Instructions for updating:
Use `tf.compat.v1.graph_util.extract_sub_graph`

Urgency
Warning

System information

• MacOS
• TensorFlow Version: 2.10
• Python version: 3.8.2

To Reproduce
convert from keras from the python api

  import tf2onnx, onnx
  onnx_model, _ = tf2onnx.convert.from_keras(model)
  onnx.save(onnx_model, "model.onnx")