add quamba demo

Author: hychiang-git

_bibliography/papers.bib

@@ -15,6 +15,7 @@ @inproceedings{chiang2024quamba
   models={https://huggingface.co/ut-enyac},
   pdf={https://arxiv.org/pdf/2410.13229.pdf},
   talk={https://youtu.be/-AdqhRhN4xc},
+  demo={https://youtu.be/7bufMyJYbsU},
   preview={quamba.png},
   bibtex_show={true},
   selected={true}