Update README.md

Author: lllyasviel

README.md

@@ -6,7 +6,7 @@
 
 Official implementation and desktop software for ["Packing Input Frame Context in Next-Frame Prediction Models for Video Generation"](https://lllyasviel.github.io/frame_pack_gitpage/).
 
-Links: [**Paper**](https://lllyasviel.github.io/frame_pack_gitpage/pack.pdf), [**Project Page**](https://lllyasviel.github.io/frame_pack_gitpage/)
+Links: [**Paper**](https://arxiv.org/abs/2504.12626), [**Project Page**](https://lllyasviel.github.io/frame_pack_gitpage/)
 
 FramePack is a next-frame (next-frame-section) prediction neural network structure that generates videos progressively.