fix utf-8 encoding

datasheets/create_json_from_excel.py

@@ -87,7 +87,7 @@ def make_json(dataframes: Dict[str, pd.DataFrame]) -> Dict[str, str]:
         dataframe.drop(dropped_columns, axis=1, inplace=True,
                        errors="ignore")
         print(sheet_name)
-        json_string = dataframe.to_json(orient="index", indent=4)
+        json_string = dataframe.to_json(orient="index", indent=4, force_ascii=False)
         json_files.update({sheet_name: json_string})
     return json_files