fix(DB/creature): Greymist murlocs movement (#6192)

Some Greymist murlocs were standing still instead of wandering around

- Closes #6020

data/sql/updates/pending_db_world/rev_1622621882267236728.sql

@@ -0,0 +1,7 @@
+INSERT INTO `version_db_world` (`sql_rev`) VALUES ('1622621882267236728');
+
+-- These murlocs aren't guarding anything so they should wander around
+UPDATE `creature` SET `wander_distance` = 5, `MovementType` = 1 WHERE `guid` IN (37854, 37951, 37955, 37967, 37974) AND `id` BETWEEN 2201 AND 2208;
+
+-- Murloc 37990 should face the bonfire he's standing next to
+UPDATE `creature` SET `orientation` = 5.9828 WHERE `guid` = 37990 AND `id` BETWEEN 2201 AND 2208;