Fix lock description

lib/model.js

@@ -680,7 +680,7 @@ module.exports = (function() {
    * @param  {Number}                    [options.limit]
    * @param  {Number}                    [options.limit]
    * @param  {Number}                    [options.offset]
    * @param  {Number}                    [options.offset]
    * @param  {Transaction}               [options.transaction]
    * @param  {Transaction}               [options.transaction]
-   * @param  {String}                    [options.lock] Lock the selected rows in either share or update mode. Possible options are transaction.LOCK.UPDATE and transaction.LOCK.SHARE. See [transaction.LOCK for an example](https://github.com/sequelize/sequelize/wiki/API-Reference-Transaction#LOCK)
+   * @param  {String|Object}             [options.lock] Lock the selected rows. Possible options are transaction.LOCK.UPDATE and transaction.LOCK.SHARE. Postgres also supports transaction.LOCK.KEY_SHARE, transaction.LOCK.NO_KEY_UPDATE and specific model locks with joins. See [transaction.LOCK for an example](api/transaction#lock)
    * @param  {Boolean}                   [options.raw] Return raw result. See sequelize.query for more information.
    * @param  {Boolean}                   [options.raw] Return raw result. See sequelize.query for more information.
    *
    *
    * @see    {Sequelize#query}
    * @see    {Sequelize#query}