Fix Decay not being scaled by some DoT multi mod (#9532)

The DoT sum calc has been using a nonexistent cfg for at least 6 years

Co-authored-by: LocalIdentity <localidentity2@gmail.com>

Author: LocalIdentity

src/Modules/CalcOffence.lua

@@ -5339,7 +5339,7 @@ function calcs.offence(env, actor, activeSkill)
 		end
 		local inc = skillModList:Sum("INC", dotCfg, "Damage", "ChaosDamage")
 		local more = skillModList:More(dotCfg, "Damage", "ChaosDamage")
-		local mult = skillModList:Override(dotTypeCfg, "DotMultiplier") or skillModList:Sum("BASE", dotTypeCfg, "DotMultiplier") + skillModList:Sum("BASE", dotTypeCfg, "ChaosDotMultiplier")
+		local mult = skillModList:Override(dotCfg, "DotMultiplier") or skillModList:Sum("BASE", dotCfg, "DotMultiplier") + skillModList:Sum("BASE", dotCfg, "ChaosDotMultiplier")
 		output.DecayDPS = skillData.decay * (1 + inc/100) * more * (1 + mult/100) * effMult
 		output.DecayDuration = 8 * debuffDurationMult
 		if breakdown then