docs: add chatgpt-action

legacy/readme.md

@@ -183,6 +183,7 @@ All of these awesome projects are built using the `chatgpt` package. 🤯
 - [Lovelines.xyz](https://lovelines.xyz)
 - [EXM smart contracts](https://github.com/decentldotland/molecule)
 - [Flutter ChatGPT API](https://github.com/coskuncay/flutter_chatgpt_api)
+- [ChatGPT Code Review Github Action](https://github.com/kxxt/chatgpt-action/)
 
 If you create a cool integration, feel free to open a PR and add it to the list.