Fix missing JS file name

src/pretix/presale/templates/pretixpresale/event/seatingplan.html

@@ -38,7 +38,7 @@
     <script src="{% statici18n request.LANGUAGE_CODE %}" async></script>
 {% endif %}
 {% if request.session.iframe_session %}
-    {% compress js %}
+    {% compress js file iframeresizer %}
         <script type="text/javascript" src="{% static "iframeresizer/iframeResizer.contentWindow.js" %}"></script>
     {% endcompress %}
 {% endif %}