Update JSDoc of Model.prototype.findOrInitialize()

The @return tag says that this method returns Promise<Instance>, while the
real return contains also an 'initialized' boolean value.

lib/model.js

@@ -1753,7 +1753,7 @@ Model.prototype.create = function(values, options) {
  * @param {Object}   [options.transaction] Transaction to run query under
  * @param {Object}   [options.transaction] Transaction to run query under
  * @param {Function} [options.logging=false] A function that gets executed while running the query to log the sql.
  * @param {Function} [options.logging=false] A function that gets executed while running the query to log the sql.
  *
  *
- * @return {Promise<Instance>}
+ * @return {Promise<Instance,initialized>}
  * @alias findOrBuild
  * @alias findOrBuild
  */
  */
 Model.prototype.findOrInitialize = Model.prototype.findOrBuild = function(options) {
 Model.prototype.findOrInitialize = Model.prototype.findOrBuild = function(options) {