don't link to retry log when showing a queue for multiple repositories, as retry log currently can't handle that

fixes #157

Author: Skgland

homu/html/queue.html

@@ -207,7 +207,9 @@ <h1>Homu queue - {% if repo_url %}<a href="{{repo_url}}" target="_blank">{{repo_
             </tbody>
         </table>
 
+        {% if not multiple %}
         <p><a href="../retry_log/{{repo_label}}">Open retry log</a></p>
+        {% endif %}
 
         <script src="../assets/jquery.min.js"></script>
         <script src="../assets/jquery.dataTables.min.js"></script>