message: Add reference to cleanup function for duckdb_result_get_chunk
diff: @@ -520,6 +520,8 @@ DUCKDB_API const char *duckdb_result_error(duckdb_result *result);
  /*!
  Fetches a data chunk from the duckdb_result. This function should be called repeatedly until the result is exhausted.
  +The result must be destroyed with `duckdb_destroy_data_chunk`.
  +
  This function supersedes all `duckdb_value` functions, as well as the `duckdb_column_data` and `duckdb_nullmask_data`
  functions. It results in significantly better performance, and should be preferred in newer code-bases.
  