small fix, closed table head

marktplatz/templates/marktplatz/admin_panel.html

@@ -21,6 +21,7 @@
         <th scope="col"> submitted</th> -->
 
     </tr>
+    </thead>
     {% for product in product_list %}
     <tr class="">
       <td scope="col"><img src="{{product.media_set.first.image_small.url}}" width="50" height="50" alt="{{ product.pk }}"> </td>