Update custom.html

apps/schoolCalendar/custom.html

@@ -420,7 +420,7 @@ draw();
             // send finished app (in addition to contents of app.json)
             sendCustomizedApp({
                 storage: [
-                    { name: "myapp.app.js", url: "app.js", content: app },
+                    { name: "schoolCalendar.app.js", url: "app.js", content: app },
                 ]
             });
         });