DB/SAI: Update target for whisper text

Target self for whisper text type cannot be used anymore
Closes #22249

sql/updates/world/3.3.5/2018_08_11_02_world.sql

@@ -0,0 +1,2 @@
+-- 
+UPDATE `smart_scripts` SET `target_type`=23, target_param1=0 WHERE  `entryorguid` IN (27899, 32331, 28665, 27959) AND `source_type`=0 AND `action_type` IN (1);