refactor(test_changelog.py): modify the linter

Author: yusin huang

tests/test_changelog.py

@@ -1,8 +1,8 @@
 import re
 from dataclasses import dataclass
 from pathlib import Path
-from unittest.mock import Mock
 from typing import Any, Optional
+from unittest.mock import Mock
 
 import pytest
 from jinja2 import FileSystemLoader