Update README.md

frontend/app_flowy/packages/appflowy_editor/README.md

@@ -87,4 +87,4 @@ Please refer to [customizing a shortcut event](documentation/customizing.md#cust
 Please refer to the API documentation (link).
 
 ## Contributing
-Contributions are what make the open source community such an amazing place to be learn, inspire, and create. Any contributions you make are greatly appreciated. Please look at [CONTRIBUTING.md](documentation/contributing.md) for details.
+Contributions are what make the open source community such an amazing place to be learn, inspire, and create. Any contributions you make are greatly appreciated. Please look at [CONTRIBUTING.md](https://appflowy.gitbook.io/docs/essential-documentation/contribute-to-appflowy/contributing-to-appflowy) for details.