fix typo

Author: waylan

docs/changelog.md

@@ -7,7 +7,7 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to the
-[Python Version Specification]: https://packaging.python.org/en/latest/specifications/version-specifiers/.
+[Python Version Specification](https://packaging.python.org/en/latest/specifications/version-specifiers/).
 See the [Contributing Guide](contributing.md) for details.
 
 ## [3.8.2] - 2025-06-19