Marketplace tests update

app/services/product_service.py

@@ -10,7 +10,7 @@ This module provides classes and functions for:
 """
 
 import logging
-from datetime import datetime
+from datetime import datetime, timezone
 from typing import Generator, List, Optional, Tuple
 
 from sqlalchemy.exc import IntegrityError
@@ -250,7 +250,7 @@ class ProductService:
             for key, value in update_data.items():
                 setattr(product, key, value)
 
-            product.updated_at = datetime.utcnow()
+            product.updated_at = datetime.now(timezone.utc)
             db.commit()
             db.refresh(product)