Fix quest Secondhand Diving Gear respawn rates (#4419)

data/sql/updates/pending_db_world/rev_1612286718992265450.sql

@@ -0,0 +1,9 @@
+INSERT INTO `version_db_world` (`sql_rev`) VALUES ('1612286718992265450');
+
+-- Faster spawn rates for quest Secondhand Diving Gear
+
+UPDATE `gameobject` SET `spawntimesecs`=2 WHERE `guid` IN
+(
+40774, -- Tool Kit
+40775 -- Damaged Diving Gear
+);