Core/Spell: fix SendSpellMiss requiring caster Unit

Port From (https://github.com/TrinityCore/TrinityCore/commit/60ff73eeba93c7f97abff0eeb504cb4b5ff8a6cd)

Source/Game/Entities/Object/WorldObject.cs

@@ -2028,6 +2028,15 @@ namespace Game.Entities
             return SpellMissInfo.None;
         }
 
+        public void SendSpellMiss(Unit target, uint spellID, SpellMissInfo missInfo)
+        {
+            SpellMissLog spellMissLog = new();
+            spellMissLog.SpellID = spellID;
+            spellMissLog.Caster = GetGUID();
+            spellMissLog.Entries.Add(new SpellLogMissEntry(target.GetGUID(), (byte)missInfo));
+            SendMessageToSet(spellMissLog, true);
+        }
+
         public FactionTemplateRecord GetFactionTemplateEntry()
         {
             var entry = CliDB.FactionTemplateStorage.LookupByKey(GetFaction());

Source/Game/Entities/Unit/Unit.Spells.cs

@@ -2103,14 +2103,6 @@ namespace Game.Entities
 
             SendCombatLogMessage(data);
         }
-        public void SendSpellMiss(Unit target, uint spellID, SpellMissInfo missInfo)
-        {
-            SpellMissLog spellMissLog = new();
-            spellMissLog.SpellID = spellID;
-            spellMissLog.Caster = GetGUID();
-            spellMissLog.Entries.Add(new SpellLogMissEntry(target.GetGUID(), (byte)missInfo));
-            SendMessageToSet(spellMissLog, true);
-        }
 
         void SendSpellDamageResist(Unit target, uint spellId)
         {

Source/Game/Spells/Spell.cs

@@ -7700,7 +7700,7 @@ namespace Game.Spells
                 if (missInfo != SpellMissInfo.None)
                 {
                     if (missInfo != SpellMissInfo.Miss)
-                        spell.GetCaster().ToUnit().SendSpellMiss(unit, spell.m_spellInfo.Id, missInfo);
+                        spell.GetCaster().SendSpellMiss(unit, spell.m_spellInfo.Id, missInfo);
                     spell.m_damage = 0;
                     spell.m_healing = 0;
                     _spellHitTarget = null;