Update README.md

arxiv link

README.md

 # SplatFields: Neural Gaussian Splats for Sparse 3D and 4D Reconstruction
 
-[Project page](https://markomih.github.io/SplatFields/) | [Paper](https://arxiv.org/pdf/XXX.XXX) <br>
+[Project page](https://markomih.github.io/SplatFields/) | [Paper](https://arxiv.org/pdf/2409.11211) <br>
 
 ![Teaser image](assets/splatFields_teaser_lego.png)