Create releasenotes.md

Author: aws-maens

releasenotes.md

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+# Transformers Neuron 0.2.0 Release Notes
+
+Date: 2023-02-24
+
+## What's New?
+	 
+- Added error handling to check if the desired generated sequence length is valid based on the model configuration
+- Improved logging:
+   - Reduced overly verbose compiler messages
+   - Disabled lazy module warnings
+	 
+## Bug Fixes
+
+- Updated `src/transformers_neuronx/gptj/demo.py` to correctly use the `amp_callback` function from `transformers_neuronx.gpt2.demo` 
+- Extend the `gpt_demo.py` `save` function to support GPT-2 and GPT-J configs
+	 
+# Transformers Neuron 0.1.0 Release Notes
+
+Date: 2023-02-08
+
+First release of `transformers-neuronx`, a new library that enables LLM model inference on Inf2 & Trn1 using the Neuron SDK. `transformers-neuronx` contains optimized model implementations that are checkpoint-compatible with HuggingFace Transformers, and currently supports Transformer Decoder models like GPT2, GPT-J and OPT.