Merge pull request #166 from opentiny/fix-readme-doc

docs: update playground link in readme doc

Author: rhlin

README.md

@@ -13,7 +13,7 @@ Whether you are building an AI chat application from scratch or adding generativ
 
 ### Try It Now
 
-You can visit the [Playground](https://playground.opentiny.design/genui-sdk) to experience Generative UI capabilities in action.  
+You can visit the [Playground](https://opentiny.github.io/genui-sdk/playground/) to experience Generative UI capabilities in action.  
 The playground itself is built using GenUI SDK.
 
 ### Getting Started

README.zh-CN.md

@@ -10,7 +10,7 @@ GenUI SDK 是 OpenTiny 面向生成式 UI（Generative UI）场景的全栈开
 
 ## 立即体验
 
-你可以前往[演练场](https://playground.opentiny.design/genui-sdk)立即体验生成式 UI 能力。演练场正是基于 GenUI SDK 开发的应用。
+你可以前往[演练场](https://opentiny.github.io/genui-sdk/playground/)立即体验生成式 UI 能力。演练场正是基于 GenUI SDK 开发的应用。
 
 ## 快速开始