Fix link typo in changelog

Author: bbc2

CHANGELOG.md

@@ -314,7 +314,7 @@ project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 [@zueve]: https://github.com/zueve
 
 [Unreleased]: https://github.com/theskumar/python-dotenv/compare/v0.20.0...HEAD
-[0.19.2]: https://github.com/theskumar/python-dotenv/compare/v0.19.2...v0.20.0
+[0.20.0]: https://github.com/theskumar/python-dotenv/compare/v0.19.2...v0.20.0
 [0.19.2]: https://github.com/theskumar/python-dotenv/compare/v0.19.1...v0.19.2
 [0.19.1]: https://github.com/theskumar/python-dotenv/compare/v0.19.0...v0.19.1
 [0.19.0]: https://github.com/theskumar/python-dotenv/compare/v0.18.0...v0.19.0