🐛 fix invalid column_type error message

Author: techouse

sqlite3_to_mysql/transporter.py

@@ -251,7 +251,7 @@ def _translate_type_from_sqlite_to_mysql(self, column_type: str) -> str:
         full_column_type: str = column_type.upper()
         match: t.Optional[t.Match[str]] = self._valid_column_type(column_type)
         if not match:
-            raise ValueError(f'"${column_type}" is not a valid column_type!')
+            raise ValueError(f'"{column_type}" is not a valid column_type!')
 
         data_type: str = match.group(0).upper()
         if data_type in {"TEXT", "CLOB", "STRING"}: