serializer: add missing weight variable to CartSessionItemOptions constructor

app/serializer.py

@@ -201,7 +201,7 @@ def format_order_items(items: list[CartOrderInfo | dict[str, str | int]]) -> str
     for i in items:
         
         if type(i) is dict:
-            i['options'] = CartSessionItemOptions(size=None, style=None)
+            i['options'] = CartSessionItemOptions(size=None, style=None, weight=0)
             i = CartOrderInfo(**i)
         
         item_title = i.title