Update readme: add note for the future change of transformer folder.

PiperOrigin-RevId: 288531984

official/nlp/bert/README.md

@@ -3,11 +3,7 @@
 The academic paper which describes BERT in detail and provides full results on a
 number of tasks can be found here: https://arxiv.org/abs/1810.04805.
 
-This repository contains TensorFlow 2 implementation for BERT.
-
-N.B. This repository is under active development. Though we intend
-to keep the top-level BERT Keras model interface stable, expect continued
-changes to the training code, utility function interface and flags.
+This repository contains TensorFlow 2.x implementation for BERT.
 
 ## Contents
   * [Contents](#contents)
@@ -110,8 +106,8 @@ pip install tf-nightly
 ```
 
 Warning: More details TPU-specific set-up instructions and tutorial should come
-along with official TF 2.x release for TPU. Note that this repo is not officially
-supported by Google Cloud TPU team yet.
+along with official TF 2.x release for TPU. Note that this repo is not
+officially supported by Google Cloud TPU team yet until TF 2.1 released.
 
 ## Process Datasets
 

official/transformer/README.md

 # Transformer Translation Model
 This is an implementation of the Transformer translation model as described in
 the [Attention is All You Need](https://arxiv.org/abs/1706.03762) paper. The
-implementation leverages tf.keras and makes sure it is compatible with TF 2.0.
+implementation leverages tf.keras and makes sure it is compatible with TF 2.x.
+
+**Note: this transformer folder is subject to be integrated into official/nlp
+folder. Due to its dependencies, we will finish the refactoring after the model
+garden 2.1 release.**
 
 ## Contents
   * [Contents](#contents)