Improve model card and add robotics pipeline tag

Hi! I'm Niels, part of the community science team at Hugging Face.

This PR improves the model card for SafeVLA by adding:
- The `robotics` pipeline tag to improve discoverability on the Hub.
- Links to the project page and official GitHub repository.
- A brief summary of the model's purpose based on the paper.

This helps users better understand and use your model artifacts.

README.md

@@ -1,10 +1,19 @@
 ---
 license: apache-2.0
+pipeline_tag: robotics
 ---
-## Paper
-[arXiv:2503.03480](https://arxiv.org/abs/2503.03480)
 
-```bash
+# SafeVLA: Towards Safety Alignment of Vision-Language-Action Model via Constrained Learning
+
+[**Project Page**](https://pku-safevla.github.io) | [**Paper**](https://arxiv.org/abs/2503.03480) | [**GitHub**](https://github.com/PKU-Alignment/SafeVLA)
+
+SafeVLA is a family of vision-language-action models (VLAs) aligned for safety using an integrated safety approach (ISA). By modeling safety requirements and utilizing safe reinforcement learning within a constrained Markov decision process (CMDP) paradigm, SafeVLA explicitly integrates safety constraints into generalist robot policies. The model achieves an effective balance between task performance and safety violation mitigation, handling long-tail risks and extreme failure scenarios in mobile manipulation tasks.
+
+## Citation
+
+If you find our code or models useful in your work, please cite our paper:
+
+```bibtex
 @inproceedings{zhang25safevla,
     title={SafeVLA: Towards Safety Alignment of Vision-Language-Action Model via Constrained Learning},
     author={Borong Zhang and Yuhao Zhang and Jiaming Ji and Yingshan Lei and Josef Dai and Yuanpei Chen and Yaodong Yang},