NiFi: typo fix parser proccessor.

Author: vladd-bit

nifi/user_python_extensions/parse_service_response.py

@@ -135,7 +135,7 @@ def process(self, context: ProcessContext, flowFile: JavaObject) -> FlowFileTran
                         _record[k] = v
 
                 if self.document_id_field_name in _record:
-                    additional_attributes[self.document_id_field_name] = _record[self.document_id_field_name]
+                    additional_attributes[self.document_id_field_name] = str(_record[self.document_id_field_name])
 
                 output_contents.append(_record)