refactor(Core/Misc): acore to Acore (#6043)

src/server/game/Combat/ThreatManager.cpp

@@ -280,7 +280,7 @@ void ThreatContainer::modifyThreatPercent(Unit* victim, int32 percent)
 void ThreatContainer::update()
 {
     if (iDirty && iThreatList.size() > 1)
-        iThreatList.sort(acore::ThreatOrderPred());
+        iThreatList.sort(Acore::ThreatOrderPred());
 
     iDirty = false;
 }

src/server/game/Combat/ThreatManager.h

@@ -256,7 +256,7 @@ private:
 
 //=================================================
 
-namespace acore
+namespace Acore
 {
     // Binary predicate for sorting HostileReferences based on threat value
     class ThreatOrderPred