Librarian Bot: Update dataset YAML metadata for model

This is a pull request to add a dataset, [`ceyda/smithsonian_butterflies`](https://huggingface.co/datasets/ceyda/smithsonian_butterflies), to the metadata for your model (defined in the `YAML` block of your model's `README.md`).
The pull request was made by [librarian-bot](https://huggingface.co/librarian-bot) and used a combination of rules and/or machine learning to suggest this additional metadata.
If this suggestion is incorrect, feel free to close this pull request.

Librarian Bot was made by [@davanstrien](https://huggingface.co/davanstrien); feel free to get in touch with feedback.

README.md

@@ -6,6 +6,7 @@ tags:
 - unconditional-image-generation
 - diffusion-models-class
 - butterfly-generation
+datasets: ceyda/smithsonian_butterflies
 ---
 
 This model is a diffusion model for unconditional image generation of butterflies