Add link to paper, pipeline tag

This PR ensures the model can be found at https://huggingface.co/papers/2410.00337, also adds a pipeline tag.

README.md

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+---
+pipeline_tag: image-to-image
+---
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 # SyntheOcc
 
 > SyntheOcc: Synthesize Geometric-Controlled Street View Images through 3D Semantic MPIs <br>
 > [Leheng Li](https://len-li.github.io), Weichao Qiu, Yingjie Cai, Xu Yan, Qing Lian, Bingbing Liu, Ying-Cong Chen
 
 SyntheOcc is a project focused on synthesizing image data under geometry control (occupancy voxel). This repository provides tools and scripts to process, train, and generate synthetic image data in the nuScenes dataset, using occupancy control.
-#### [Project Page](https://len-li.github.io/syntheocc-web) | [Paper](https://arxiv.org/) | [Video](https://len-li.github.io/syntheocc-web/videos/teaser-occedit.mp4) | [Checkpoint](https://huggingface.co/lilelife/SyntheOcc)
+#### [Project Page](https://len-li.github.io/syntheocc-web) | [Paper](https://huggingface.co/papers/2410.00337) | [Video](https://len-li.github.io/syntheocc-web/videos/teaser-occedit.mp4) | [Checkpoint](https://huggingface.co/lilelife/SyntheOcc)
 
 Code: https://github.com/EnVision-Research/SyntheOcc