Librarian Bot: Update dataset YAML metadata for model

This is a pull request to add a dataset, [`laion/laion-art`](https://huggingface.co/datasets/laion/laion-art), 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

@@ -1,12 +1,13 @@
 ---
-license: openrail++
 language:
 - en
+license: openrail++
 tags:
 - art
 - diffusers
 - stable diffusion
 - controlnet
+datasets: laion/laion-art
 ---
 Here's the first version of controlnet for stablediffusion 2.1 for diffusers
 Trained on a subset of laion/laion-art