Correct OfferRewardText & RequestItemsText for Q.9826

`OfferRewardText` and `RequestItemsText`, aka Progress and Completion texts, for Quest #: 9826 (Contact from Dalaran) were swapped.

Please reference WoWhead (linked in commit).

Resolves #1237

Updates/0532_q.9826_text.sql

@@ -0,0 +1,8 @@
+-- Contact from Dalaran: https://www.wowhead.com/tbc/quest=9826/contact-from-dalaran
+-- Resolves https://github.com/cmangos/tbc-db/pull/1237
+-- Progress and Completion text were swapped.
+UPDATE `quest_template` SET
+`OfferRewardText` = 'Alturus entrusted you with this information? That old fool.$B$BI suppose the damage is done, we might as well make use of you. I suppose you will cooperate?',
+`RequestItemsText` = 'You know of the Violet Eye? You do not look familiar.'
+WHERE `entry` = 9826;
+