Update ChangeLog

Author: sebastianbergmann

ChangeLog-9.6.md

@@ -2,6 +2,12 @@
 
 All notable changes of the PHPUnit 9.6 release series are documented in this file using the [Keep a CHANGELOG](https://keepachangelog.com/) principles.
 
+## [9.6.16] - 2024-MM-DD
+
+### Fixed
+
+* [#5516](https://github.com/sebastianbergmann/phpunit/issues/5516): Assertions that use the `LogicalNot` constraint (`assertNotEquals()`, `assertStringNotContainsString()`, ...) can generate confusing failure messages
+
 ## [9.6.15] - 2023-12-01
 
 ### Fixed
@@ -107,6 +113,7 @@ All notable changes of the PHPUnit 9.6 release series are documented in this fil
 * [#5064](https://github.com/sebastianbergmann/phpunit/issues/5064): Deprecate `PHPUnit\Framework\TestCase::getMockClass()`
 * [#5132](https://github.com/sebastianbergmann/phpunit/issues/5132): Deprecate `Test` suffix for abstract test case classes
 
+[9.6.16]: https://github.com/sebastianbergmann/phpunit/compare/9.6.15...9.6
 [9.6.15]: https://github.com/sebastianbergmann/phpunit/compare/9.6.14...9.6.15
 [9.6.14]: https://github.com/sebastianbergmann/phpunit/compare/9.6.13...9.6.14
 [9.6.13]: https://github.com/sebastianbergmann/phpunit/compare/9.6.12...9.6.13