Merge pull request #6040 from Countly/changelog_24.05.26

Update CHANGELOG.md 24.05.26

Author: ArtursKadikis

CHANGELOG.md

@@ -1,3 +1,11 @@
+## Version 24.05.26
+Enterprise fixes:
+- [ab-testing] Fixed bug with variant user filtering
+- [license] Fixed issue with handling invalid date periods
+
+Fixes:
+- [script] Refined delete_custom_events.js to clean up faulty/dead events completely.
+
 ## Version 24.05.25
 Fixes:
 - [app-management] Unescaping HTML for created/updated application names