Neuron SDK 2.13.0 Release

* Adding deprecation readme

Author: eshalakhotia

README.md

@@ -1 +1,5 @@
-This Megatron-LM library (source https://github.com/NVIDIA/Megatron-LM) is adapted for use with AWS Trainium via Neuron SDK. Please see Neuron SDK documentation for tutorial on using Megatron-LM on AWS Trainium.
+This repository is no longer supported.
+
+Please start using AWS Neuron reference for NeMo Megatron (https://github.com/aws-neuron/neuronx-nemo-megatron) or Neuron Distributed (https://github.com/aws-neuron/neuronx-distributed) instead.
+
+This Megatron-LM library (source https://github.com/NVIDIA/Megatron-LM) is adapted for use with AWS Trainium via Neuron SDK.