chore: adjust log level of not being able to find soundbank

src/ObjLoading/Game/T6/ObjLoaderT6.cpp

@@ -93,7 +93,7 @@ namespace T6
             return sndBankPtr;
         }
 
-        con::error("Failed to load sound bank '{}'", soundBankFileName);
+        con::warn("Could not find sound bank '{}'", soundBankFileName);
         return nullptr;
     }