adding arxiv for simple gradients

Author: quentinll

publications/simple-gradients/index.html

@@ -119,7 +119,7 @@ <h1 class="title is-1 publication-title">End-to-End and Highly-Efficient Differe
                 </a>
               </span>
               <span class="link-block">
-                <a href=""
+                <a href="https://arxiv.org/abs/2409.07107"
                    class="external-link button is-normal is-rounded is-dark">
                   <span class="icon">
                       <i class="ai ai-arxiv"></i>