LoadItemScript should return a borrowed ptr

src/Battling/ScriptHandling/ScriptResolver.hpp

@@ -24,7 +24,7 @@ namespace CreatureLib::Battling {
             return nullptr;
         };
 
-        virtual ArbUt::OptionalUniquePtr<ItemUseScript>
+        virtual ArbUt::OptionalBorrowedPtr<ItemUseScript>
         LoadItemScript([[maybe_unused]] const CreatureLib::Library::Item* non_null item) {
             return nullptr;
         };