mypy fix

Signed-off-by: Nitish Bharambe <[email protected]>

Author: nitbharambe

src/power_grid_model_io/converters/tabular_converter.py

@@ -838,7 +838,7 @@ def get_id(row: pd.Series) -> int:
             key = row.dropna().to_dict()
             row_table = key.pop("table") if table is None and "table" in key else table
             row_name = key.pop("name") if name is None and "name" in key else name
-            return self.get_id(table=row_table, key=key, name=row_name)
+            return self.get_id(table=cast(row_table, str), key=key, name=row_name)
 
         return keys.apply(get_id, axis=1).to_list()