Update CHANGELOG.md

Co-authored-by: Oleg Jukovec <oleg.jukovec@gmail.com>

Author: KaymeKaydex

CHANGELOG.md

@@ -12,7 +12,7 @@ Versioning](http://semver.org/spec/v2.0.0.html) except to the first release.
 
 - Extend box with replication information (#427).
 - Implemented all box.schema.user operations requests and sugar interface.
-- Implemented box.session.su request and sugar interface only for current session granting.
+- Implemented box.session.su request and sugar interface only for current session granting (#426).
 
 ### Changed