Fix mypy error

Author: sanders41

prelude_parser/pandas.py

@@ -38,5 +38,5 @@ def to_dataframe(xml_file: str | Path, *, short_names: bool = False) -> pd.DataF
         >>> from prelude_parser.pandas import to_dataframe
         >>> df = to_dataframe("physical_examination.xml")
     """
-    data = _parse_flat_file_to_pandas_dict(xml_file, short_names)
+    data = _parse_flat_file_to_pandas_dict(xml_file, short_names=short_names)
     return pd.DataFrame.from_dict(data)