update docstring

Author: pnilan

airbyte_cdk/sources/declarative/spec/spec.py

@@ -73,8 +73,7 @@ def migrate_config(self, config_path: Optional[Any], config: Mapping[str, Any])
         """
         Apply all specified config transformations to the provided config and save the modified config to the given path and emit a control message.
 
-        :param args: Command line arguments
-        :param source: Source instance
+        :param config_path: The path to the config file
         :param config: The user-provided config to migrate
         """