DB/Quest: Fix RewardText for Frostmaw quest

Closes #22373

sql/updates/world/3.3.5/2018_09_02_02_world_335.sql

@@ -0,0 +1,2 @@
+-- Quest: Frostmaw
+UPDATE `quest_offer_reward` SET `RewardText`="Both strength and cunning were needed to find and defeat Frostmaw, $N. You have both.$b$bYour path has taken you to the valleys of Thousand Needles and to the high mountains of Alterac. It will one day lead you through all the Earthmother's lands, for such is the way of the hunter." WHERE `ID`= 1136;