Add pipeline tag and library name

This PR adds the `pipeline_tag: text-to-video` and `library_name: transformers` metadata to the model card, making it easier for users to discover and utilize the model. It also adds a link to the paper for easier access to the research behind the model.

README.md

@@ -1,5 +1,7 @@
 ---
 license: apache-2.0
+pipeline_tag: text-to-video
+library_name: transformers
 ---
 
 ## Open-Sora: Democratizing Efficient Video Production for All
@@ -10,6 +12,8 @@ Open-Sora not only democratizes access to advanced video generation techniques,
 streamlined and user-friendly platform that simplifies the complexities of video generation.
 With Open-Sora, our goal is to foster innovation, creativity, and inclusivity within the field of content creation.
 
+[Paper](https://huggingface.co/papers/2503.09642)
+
 Github: https://github.com/hpcaitech/Open-Sora
 
 ## 🔆 Reports
@@ -222,4 +226,4 @@ Here we only list a few of the projects. For other works and datasets, please re
 
 ## Star History
 
-[![Star History Chart](https://api.star-history.com/svg?repos=hpcaitech/Open-Sora&type=Date)](https://star-history.com/#hpcaitech/Open-Sora&Date)
+[![Star History Chart](https://api.star-history.com/svg?repos=hpcaitech/Open-Sora&type=Date)](https://star-history.com/#hpcaitech/Open-Sora&Date)