Update ChangeLog

Author: sebastianbergmann

ChangeLog-8.5.md

@@ -9,6 +9,10 @@ All notable changes of the PHPUnit 8.5 release series are documented in this fil
 * [#4812](https://github.com/sebastianbergmann/phpunit/issues/4812): Do not enforce time limits when a debugging session through DBGp is active
 * [#4835](https://github.com/sebastianbergmann/phpunit/issues/4835): Support for `$GLOBALS['_composer_autoload_path']` introduced in Composer 2.2
 
+### Fixed
+
+* [#4840](https://github.com/sebastianbergmann/phpunit/pull/4840): TestDox prettifying for class names does not correctly handle diacritics
+
 ## [8.5.21] - 2021-09-25
 
 ### Changed