DB/Auras: change bleeding damage increase aura stack rules to SPELL_GROUP_STACK_RULE_EXCLUSIVE_HIGHEST

sql/updates/world/custom/custom_2019_05_05_01_world.sql

@@ -0,0 +1 @@
+UPDATE `spell_grouo_stack_rules` SET `stack_rule`= 4 WHERE `group_id`= 1141;