Credit Bespoke Nimble in the model card (#2)

- Credit Bespoke Nimble in the model card (8a7270b6dcc30110234e7fc25faaf0d6329c78c0)

README.md

@@ -132,4 +132,24 @@ A large part of the gains are thanks to the [tasksource](https://github.com/sile
     url = "https://aclanthology.org/2024.lrec-main.1361",
     pages = "15655--15684",
 }
-```
+```
+
+Our data pipeline also builds on [Bespoke Nimble](https://github.com/bespokelabsai/nimble)
+by Bespoke Labs. The data pipeline of
+[pplx-decider-v1-27b](https://huggingface.co/perplexity-ai/pplx-decider-v1-27b) was built
+around human-labelled public datasets that we converted into Choice and Noul decisions
+with Nimble's converters. v1.1 adds a lot of new data, so Nimble-converted data is now
+only a small share of the training set. We also use Nimble's published benchmark subsets,
+pinned by record ID and checksum, to keep those benchmark records and related examples
+out of training. Nimble is downloaded at a pinned revision when the data is built and is
+not redistributed here. If you use this part of the pipeline, please also cite Nimble:
+
+```bibtex
+@misc{nimble2026,
+  author = {{Bespoke Labs} and Sathiamoorthy, Maheswaran},
+  title = {Nimble},
+  year = {2026},
+  howpublished = {\url{https://github.com/bespokelabsai/nimble}},
+  note = {Model: https://huggingface.co/bespokelabs/Bespoke-Nimble-9B}
+}
+```