add quamba2 slides

Author: hychiang-git

_bibliography/papers.bib

@@ -14,6 +14,7 @@ @inproceedings{chiang2025quamba2
   code={https://github.com/enyac-group/Quamba},
   models={https://huggingface.co/ut-enyac},
   pdf={https://arxiv.org/pdf/2503.22879},
+  slides={https://www.youtube.com/watch?v=L9eY_vgWKSo},
   preview={quamba2.png},
   bibtex_show={true},
   selected={true}