fix(docs): Fix link in CHANGELOG.md

Author: LeoniePhiline

CHANGELOG.md

@@ -129,7 +129,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added full crate documentation.
 
 [unreleased]: https://github.com/LeoniePhiline/axum-csrf-sync-pattern/compare/0.3.1...HEAD
-[0.3.0]: https://github.com/LeoniePhiline/axum-csrf-sync-pattern/compare/0.3.0...0.3.1
+[0.3.1]: https://github.com/LeoniePhiline/axum-csrf-sync-pattern/compare/0.3.0...0.3.1
 [0.3.0]: https://github.com/LeoniePhiline/axum-csrf-sync-pattern/compare/0.2.2...0.3.0
 [0.2.2]: https://github.com/LeoniePhiline/axum-csrf-sync-pattern/compare/0.2.1...0.2.2
 [0.2.1]: https://github.com/LeoniePhiline/axum-csrf-sync-pattern/compare/0.2.0...0.2.1