test mypy fix

Author: dougbrn

src/nested_pandas/nestedframe/core.py

@@ -1968,7 +1968,7 @@ def map_rows(
         self,
         func: Callable[..., Any],
         columns: None | str | list[str] = None,
-        row_container: Literal[dict] | Literal["args"] = "dict",
+        row_container: Literal["dict"] | Literal["args"] = "dict",
         output_names: None | str | list[str] = None,
         infer_nesting: bool = True,
         append_columns: bool = False,