message: Add SavedModel metadata deprecation notices to the release notes.
diff: @@ -764,6 +764,7 @@ stjohnso98, <NAME>, <HERE>, <USING>, <GITHUB>, <HANDLE>
  * Add `tf.saved_model.LoadOptions` with [`experimental_io_device`](https://www.tensorflow.org/versions/r2.3/api_docs/python/tf/saved_model/LoadOptions?hl=en) as arg with default value `None` to choose the I/O device for loading models and weights.
  * Update `tf.saved_model.SaveOptions` with [`experimental_io_device`](https://www.tensorflow.org/versions/r2.3/api_docs/python/tf/saved_model/SaveOptions?hl=en) as arg with default value `None` to choose the I/O device for saving models and weights.
  * Mutable tables now restore checkpointed values when loaded from SavedModel.
  + * The user object metadata field in the SavedModel proto has been deprecated as part of the updates to Keras SavedModel. Keras was the only consumer of this field prior to the update.
  * GPU
  * TF 2.3 includes PTX kernels only for [compute capability](https://developer.nvidia.com/cuda-gpus) 7.0 to reduce the TF pip binary size. Earlier releases included PTX for a variety of older compute capabilities.
  * Remove environmental variable `TF_USE_CUDNN`.
  