Updates CHANGELOG for release

CHANGELOG.md

@@ -13,6 +13,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [3.15.1] - 2023-08-02
+
+### Fixed
+
+- For mapped fields in JPA entities, an error was thrown if the getter wasn't used in `equals` and `hashCode` even if the field wasn't used at all. ([Issue 816](https://github.com/jqno/equalsverifier/issues/816))
+
+### Changed
+
+- Improves error messages when calling `#withPrefabValues` incorrectly.
+
 ## [3.15] - 2023-07-08
 
 ### Changed
@@ -1150,7 +1160,8 @@ 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...HEAD
+[unreleased]: https://github.com/jqno/equalsverifier/compare/equalsverifier-3.15.1...HEAD
+[3.15.1]: https://github.com/jqno/equalsverifier/compare/equalsverifier-3.15...equalsverifier-3.15.1
 [3.15]: https://github.com/jqno/equalsverifier/compare/equalsverifier-3.14.3...equalsverifier-3.15
 [3.14.3]: https://github.com/jqno/equalsverifier/compare/equalsverifier-3.14.2...equalsverifier-3.14.3
 [3.14.2]: https://github.com/jqno/equalsverifier/compare/equalsverifier-3.14.1...equalsverifier-3.14.2