Update README.md

Author: urialon

README.md

@@ -6,6 +6,8 @@ Shuyan Zhou, Uri Alon, Sumit Agarwal, Graham Neubig, [CodeBERTScore: Evaluating
 CodeBERTScore is an Automatic Evaluation Metric for Code, based on [BERTScore](https://arxiv.org/abs/1904.09675).
 This repository is based on the code of [BERTScore](https://github.com/Tiiiger/bert_score), and we are grateful to the authors for releasing their code.
 
+_**April 2023**_ - CodeBERTScore is now available on [pypi](https://pypi.org/project/code-bert-score/), which means that you can simply `pip install code-bert-score`!
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 * [Example](#example)
 * [How does it work?](#how-does-it-work)