Add pipeline tag to improve discoverability

Hi! I'm Niels from the Hugging Face community team.

I've opened this PR to add the `image-to-video` pipeline tag to your model card's metadata. This helps users discover your model when filtering for video generation tasks on the Hugging Face Hub. I've also kept the existing library name and license metadata.

README.md

@@ -1,6 +1,7 @@
 ---
-license: apache-2.0
 library_name: diffusers
+license: apache-2.0
+pipeline_tag: image-to-video
 ---
 
 <h1 align="center">
@@ -65,7 +66,8 @@ library_name: diffusers
 ```bibtex
 @article{liu2025robotransfer,
   title={RoboTransfer: Geometry-Consistent Video Diffusion for Robotic Visual Policy Transfer},
-  author={Liu, Liu and Wang, Xiaofeng and Zhao, Guosheng and Li, Keyu and Qin, Wenkang and Qiu, Jiaxiong and Zhu, Zheng and Huang, Guan and Su, Zhizhong},
+  author={Liu, Liu and Wang, Xiaofeng and Zhao, Guosheng and Li, Keyu Li, Wenkang Qin, Jiaxiong Qiu, Zheng Zhu, Guan Huang, Zhizhong Su},
   journal={arXiv preprint arXiv:2505.23171},
   year={2025}
 }
+```