fix(DB/gameobject): Adjust Barrel location (#6197)

Melon Juice Barrel (id: 14890) was floating in the air.
Its z coordinate has been adjusted.

- Closes #6157
- Closes chromiecraft/chromiecraft#744

data/sql/updates/pending_db_world/rev_1622640898688425404.sql

@@ -0,0 +1,3 @@
+INSERT INTO `version_db_world` (`sql_rev`) VALUES ('1622640898688425404');
+
+UPDATE `gameobject` SET `position_z` = 5.4598 WHERE `guid` = 14890 AND `id` = 3659;