Add task categories, language tags, and project links

This PR improves the dataset card for OpenDialog by adding:
- `task_categories`: set to `text-to-speech`.
- `language`: added `en` and `zh` based on the dataset description (5074 hours of English and 1759 hours of Chinese).
- Links to the paper, the official GitHub repository, and the project page.
- A citation section for the research paper.

These additions help with the discoverability and documentation of the dataset on the Hugging Face Hub.

README.md

@@ -1,11 +1,33 @@
 ---
 license: cc-by-nc-4.0
+task_categories:
+- text-to-speech
+language:
+- en
+- zh
 ---
 
 # OpenDialog
 
-OpenDialog is a 6.8k hours spoken dialogue dataset, introduced in paper [ZipVoice-Dialog](https://arxiv.org/abs/2507.09318). Check the paper for details
+OpenDialog is a 6.8k hours spoken dialogue dataset, introduced in the paper [ZipVoice-Dialog: Non-Autoregressive Spoken Dialogue Generation with Flow Matching](https://arxiv.org/abs/2507.09318). 
 
-It consists of 1759 hours of Chinese data and 5074 hours of English data. 
+- **Paper:** [https://arxiv.org/abs/2507.09318](https://arxiv.org/abs/2507.09318)
+- **GitHub:** [https://github.com/k2-fsa/ZipVoice](https://github.com/k2-fsa/ZipVoice)
+- **Project Page:** [https://zipvoice-dialog.github.io](https://zipvoice-dialog.github.io)
 
-This dataset is also available at https://www.modelscope.cn/datasets/k2-fsa/OpenDialog (more friendly for users from China mainland)
+OpenDialog is the first large-scale (6.8k hours) open-source spoken dialogue dataset derived from in-the-wild speech data. It consists of:
+- **English data:** 5074 hours
+- **Chinese data:** 1759 hours
+
+This dataset is also available at [ModelScope](https://www.modelscope.cn/datasets/k2-fsa/OpenDialog) (more friendly for users from China mainland).
+
+## Citation
+
+```bibtex
+@article{zhu2025zipvoicedialog,
+      title={ZipVoice-Dialog: Non-Autoregressive Spoken Dialogue Generation with Flow Matching},
+      author={Zhu, Han and Kang, Wei and Guo, Liyong and Yao, Zengwei and Kuang, Fangjun and Zhuang, Weiji and Li, Zhaoqing and Han, Zhifeng and Zhang, Dong and Zhang, Xin and Song, Xingchen and Lin, Long and Povey, Daniel},
+      journal={arXiv preprint arXiv:2507.09318},
+      year={2025}
+}
+```