Librarian Bot: Update dataset YAML metadata for model

This is a pull request to add a dataset, [`din0s/msmarco-nlgen`](https://huggingface.co/datasets/din0s/msmarco-nlgen), 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

@@ -2,6 +2,7 @@
 license: apache-2.0
 tags:
 - generated_from_trainer
+datasets: din0s/msmarco-nlgen
 model-index:
 - name: t5-base-msmarco-nlgen-ob
   results: []