bugfix: fetch_series_by_api_link.m

src/subroutines/fetch_series_by_api_link.m

@@ -72,7 +72,7 @@ else
                 end
             end
         end
-        dimensions_labels_columns_names = dimensions_labels_columns_names_dataset;
+        dimensions_labels_columns_names = [dimensions_labels_columns_names, dimensions_labels_columns_names_dataset];
     end
     ordered_columns_names = [common_columns, dimensions_codes_columns_names, dimensions_labels_columns_names];