Update link to technical report in index.html

Author: erwinwu211

index.html

@@ -127,7 +127,7 @@ <h1 class="title publication-title">
           <div class="column">
             <div class="publication-links">
               <span class="link-block">
-                <a href="https://github.com/ShandaAI/siggraph-asia-bof/blob/main/shanda_ai_tech_report.pdf" target="_blank"
+                <a href="https://arxiv.org/abs/2512.13674" target="_blank"
                   class="external-link button is-normal is-rounded is-light">
                   <span class="icon"><i class="fas fa-file-pdf"></i></span>
                   <span>Technical Report</span>