refactor: using optional keyword

utils/pagination.py

@@ -1,13 +1,15 @@
+from typing import Optional
+
 from schemas.base import PaginationSchema
 
 
 async def pagination_parameters(
-    page: int | None = None, items_per_page: int | None = None
+    page: Optional[int] = None, items_per_page: Optional[int] = None
 ) -> PaginationSchema:
     return PaginationSchema(page=page, items_per_page=items_per_page)
 
 
-def is_valid_pagination(pagination: PaginationSchema | None) -> bool:
+def is_valid_pagination(pagination: Optional[PaginationSchema]) -> bool:
     if not pagination:
         return False
     return all(