fix unit tests

scripts/release/changelog_test.py

@@ -68,7 +68,8 @@ def test_invalid_date(self):
  with self.assertRaises(Exception) as context:
  extract_date_and_kind_from_file_name("20250640_refactor_codebase.md")
  self.assertEqual(
- str(context.exception), "20250640_refactor_codebase.md - date 20250640 is not in the expected format %Y%m%d"
+ str(context.exception),
+ "20250640_refactor_codebase.md - date '20250640' is not in the expected format %Y%m%d",
  )
 
  def test_wrong_file_name_format_date(self):