Update readme.md

Author: QinghongLin

readme.md

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 <!-- This is the official repo for Code2World, a novel VLM-based GUI World Model that predicts dynamic transitions via renderable code generation. -->
 
-📖 **TL;DR:** Coder with Next-Page Prediction as GUI World Model.
+📖 **TL;DR:** Coder with Next-State Rendering as GUI World Model.
 
 
 ## 🎯 Overview