fix: Used request.relation_attribute on self._include_on_relations

pyatlan/model/lineage.py

@@ -655,7 +655,7 @@ def request(self) -> LineageListRequest:
                 for field in self._includes_on_results
             ]
         if self._include_on_relations:
-            request.attributes = [
+            request.relation_attributes = [
                 field.atlan_field_name if isinstance(field, AtlanField) else field
                 for field in self._include_on_relations
             ]