Update arXiv link in index.html

Author: liyitang22

index.html

@@ -4222,7 +4222,7 @@ <h1 class="title is-3 publication-title">BFM-Zero: A Promptable Behavioral Found
                 <!-- arXiv Link. -->
                 <span class="link-block">
                   <!-- TODO:update -->
-                  <a href="./static/images/meta.png"
+                  <a href="https://arxiv.org/abs/2511.04131"
                      class="external-link button is-normal is-rounded is-dark" target="_blank">
                     <span class="icon">
                         <i class="ai ai-arxiv"></i>