Update ChangeLog

Author: sebastianbergmann

ChangeLog-11.4.md

@@ -9,6 +9,10 @@ All notable changes of the PHPUnit 11.4 release series are documented in this fi
 * [#6010](https://github.com/sebastianbergmann/phpunit/pull/6010): Improve parameter name for `assertGreaterThan()`, `assertGreaterThanOrEqual()`, `assertLessThan()`, and `assertLessThanOrEqual()`
 * [#6012](https://github.com/sebastianbergmann/phpunit/pull/6012): Remove empty lines between TeamCity events
 
+### Fixed
+
+[#6017](https://github.com/sebastianbergmann/phpunit/pull/6017): Deprecation Triggers are not registered when Process Isolation is used
+
 ## [11.4.2] - 2024-10-19
 
 ### Changed