fix(DB/SAI): Deathstalker Vincent has SAI in DB but not linked (#9404)

data/sql/updates/pending_db_world/rev_1638113589865941888.sql

@@ -0,0 +1,4 @@
+INSERT INTO `version_db_world` (`sql_rev`) VALUES ('1638113589865941888');
+
+-- Add SAI to Deathstalker Vincent
+UPDATE `creature_template` SET `AIName`='SmartAI' WHERE `entry`=4444;