Core/Auras: implement correct model for Bear Form (used by npcs)

Closes #7337

(cherrypicked from 8e865a60c8)

src/server/game/Spells/Auras/SpellAuraEffects.cpp

@@ -1687,6 +1687,10 @@ void AuraEffect::HandleAuraModShapeshift(AuraApplication const* aurApp, uint8 mo
 
     switch (GetId())
     {
+        // Bear Form
+        case 7090:
+            modelid = 29414;
+            break;
         // Roc Form
         case 35200:
             modelid = 4877;