formating for python 3.10

Author: davidsbatista

integrations/valkey/src/haystack_integrations/document_stores/valkey/document_store.py

@@ -793,7 +793,7 @@ def delete_by_filter(self, filters: dict[str, Any]) -> int:
         _validate_filters(filters)
         try:
             docs_to_delete = self.filter_documents(filters)
-            if ids:= [doc.id for doc in docs_to_delete]:
+            if ids := [doc.id for doc in docs_to_delete]:
                 self.delete_documents(ids)
             return len(ids)
         except FilterError: