Merge pull request #1452 from openkraken/add-webf-links

Update README.md

Author: andycall

README.md

@@ -1,5 +1,9 @@
 ![kraken Post](https://user-images.githubusercontent.com/677114/101163298-6264ae80-366e-11eb-9151-f560d18c2ceb.png)
 
+> ⭐️ If your project uses Flutter 3.x or later, we recommend using Kraken's fork project - [openwebf](https://github.com/openwebf/webf).  
+> 
+> ⭐️ 如果你的项目使用的 Flutter 3.x 以上版本，我们推荐使用 Kraken 的 fork 项目 —— [openwebf](https://github.com/openwebf/webf)。
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 # [Kraken](https://openkraken.com/) [![pub package](https://img.shields.io/pub/v/kraken.svg)](https://pub.dev/packages/kraken) [![Integration Test WorkFlow](https://github.com/openkraken/kraken/actions/workflows/integration_test.yml/badge.svg?branch=main)](https://github.com/openkraken/kraken/actions/workflows/integration_test.yml)
 
 ## 💁 Have a try