fix bracing in template tag for PREVIEW_ORIGINALS

archivebox/templates/core/snapshot.html

@@ -428,7 +428,7 @@
                           </div>
                         </div>
                     </div>
-                    {{% endif %}}
+                    {% endif %}
                     <div class="col-lg-2">
                         <div class="card">
                             <iframe class="card-img-top" src="{{headers_path}}" sandbox="allow-same-origin allow-top-navigation-by-user-activation allow-scripts allow-forms" scrolling="no" loading="lazy"></iframe>