Fix param definition is jsdoc for app.render

fixes expressjs#2741

lib/application.js

@@ -522,7 +522,7 @@ app.del = deprecate.function(app.delete, 'app.del: Use app.delete instead');
  *    })
  *
  * @param {String} name
- * @param {String|Function} options or fn
+ * @param {Object|Function} options or fn
  * @param {Function} callback
  * @public
  */