Fix args typo for $order param (#125)

Author: rmorse

src/Database/Query.php

@@ -306,7 +306,7 @@ class Query extends Base {
 	 *                                           Default true.
 	 *     @type string|array $orderby           Accepts false, an empty array, or 'none' to disable `ORDER BY` clause.
 	 *                                           Default '', to primary column ID.
-	 *     @type string       $item              How to item retrieved items. Accepts 'ASC', 'DESC'.
+	 *     @type string       $order             How to order retrieved items. Accepts 'ASC', 'DESC'.
 	 *                                           Default 'DESC'.
 	 *     @type string       $search            Search term(s) to retrieve matching items for.
 	 *                                           Default empty.