doc(belongs-to-many): correct return type for countAssociations

lib/associations/belongs-to-many.js

@@ -279,7 +279,7 @@ var BelongsToMany = function(source, target, options) {
      * @param {Object} [options]
      * @param {Object} [options]
      * @param {Object} [options.where] An optional where clause to limit the associated models
      * @param {Object} [options.where] An optional where clause to limit the associated models
      * @param {String|Boolean} [options.scope] Apply a scope on the related model, or remove its default scope by passing false
      * @param {String|Boolean} [options.scope] Apply a scope on the related model, or remove its default scope by passing false
-     * @return {Promise<Array<Instance>>}
+     * @return {Promise<Int>}
      * @method countAssociations
      * @method countAssociations
      */
      */
     count: 'count' + plural
     count: 'count' + plural