Add link to paper, improve formatting

This PR adds a link to the paper and improves formatting.

README.md

@@ -7,7 +7,9 @@ tags:
 - pytorch_model_hub_mixin
 ---
 
-This model has been pushed to the Hub using the [PytorchModelHubMixin](https://huggingface.co/docs/huggingface_hub/package_reference/mixins#huggingface_hub.PyTorchModelHubMixin) integration:
-- Library: https://github.com/showlab/Show-o
-- Arxiv: https://arxiv.org/abs/2408.12528v2
-- Docs: [More Information Needed]
+This model has been pushed to the Hub using the [PytorchModelHubMixin](https://huggingface.co/docs/huggingface_hub/package_reference/mixins#huggingface_hub.PyTorchModelHubMixin) integration.
+
+*   Library: <https://github.com/showlab/Show-o>
+*   Paper: [Show-o2: Improved Native Unified Multimodal Models](https://huggingface.co/papers/2506.15564)
+*   Arxiv: https://arxiv.org/abs/2408.12528v2
+*   Docs: [More Information Needed]