fix(DB/Creature): Correct Greater Fire Elemental template values. (az…

…erothcore#19686)

* Init.

* Add additional sniffed values.

* Add damage modifier default.

data/sql/updates/pending_db_world/ele-class.sql

@@ -0,0 +1 @@
+UPDATE `creature_template` SET `minlevel` = 68, `maxlevel` = 80, `exp` = 0, `DamageModifier` = 1, `unit_class` = 2 WHERE `entry` = 15438;