Update public/index.html

public/index.html

@@ -407,6 +407,7 @@
       <div class="row gy-4">
 
         <!-- Publikationen -->
+         <div class="col-lg-4 col-md-6 portfolio-item isotope-item filter-publikationen">
         <!-- Paper 1 -->
               <div class="col-lg-6">
                 <div class="publication-card">
@@ -438,6 +439,7 @@
                   <p><strong>Arfeli et al. (2024):</strong> Development for AI Teaching</p>
                 </div>
               </div>
+            </div>
       </div>
                     <!-- End Publikation -->