Updates CHANGELOG for release

CHANGELOG.md

@@ -13,6 +13,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [3.15.4] - 2023-11-29
+
 ### Added
 
 -   A check for Scala with its `-Xcheckinit` flag switched on. This flag generates a field that should have been marked as synthetic, but isn't, so EqualsVerifier has to check for this field explicitly.
@@ -1175,7 +1177,8 @@ Please don't use version 1.3; [it's a broken release](https://jqno.nl/post/2013/
 
 You can now use EqualsVerifier!
 
-[unreleased]: https://github.com/jqno/equalsverifier/compare/equalsverifier-3.15.3...HEAD
+[unreleased]: https://github.com/jqno/equalsverifier/compare/equalsverifier-3.15.4...HEAD
+[3.15.4]: https://github.com/jqno/equalsverifier/compare/equalsverifier-3.15.3...equalsverifier-3.15.4
 [3.15.3]: https://github.com/jqno/equalsverifier/compare/equalsverifier-3.15.2...equalsverifier-3.15.3
 [3.15.2]: https://github.com/jqno/equalsverifier/compare/equalsverifier-3.15.1...equalsverifier-3.15.2
 [3.15.1]: https://github.com/jqno/equalsverifier/compare/equalsverifier-3.15...equalsverifier-3.15.1