Minor Update index.html (cebra.ai) home page (#257)

Update index.html

- added updated link to xCEBRA PMLR
- changed Documentation --> Documentation & Demos

Author: MMathisLab

docs/root/index.html

@@ -131,7 +131,7 @@ <h4>
                     <div class="col-sm-4 mb-2">
                         <h4>
                             <a href="https://cebra.ai/docs/" target="_blank"> <i class="fas fa-book"></i>
-                                Documentation
+                                Documentation & Demos
                             </a>
                         </h4>
                     </div>
@@ -308,7 +308,7 @@ <h3>
                             &nbsp;&nbsp;author={Steffen Schneider and Rodrigo Gonz{\'a}lez Laiz and Anastasiia Filippova and Markus Frey and Mackenzie Weygandt Mathis},<br/>
                             &nbsp;&nbsp;booktitle={The 28th International Conference on Artificial Intelligence and Statistics},<br/>
                             &nbsp;&nbsp;year={2025},<br/>
-                            &nbsp;&nbsp;url={https://openreview.net/forum?id=aGrCXoTB4P}<br/>
+                            &nbsp;&nbsp;url={https://proceedings.mlr.press/v258/schneider25a.html}<br/>
                             }
                         </small>
                     </div>