Fix changelog for 8.9.3

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

CHANGELOG

@@ -42,8 +42,10 @@ v 8.9.3
   - Fix missing avatar on system notes. !4954
   - Reduce overhead and optimize ProjectTeam#max_member_access performance. !4973
   - Use update_columns to by_pass all the dirty code on active_record. !4985
+v 8.9.3 (unreleased)
+  - Decreased min width of screen to 1280px for pinned sidebar
+  - Fix encrypted data backwards compatibility after upgrading attr_encrypted gem
   - Update mobile button icons to be more inline with typical UI paradigms
-v 8.9.3
   - Add sub nav to file page view
 v 8.9.2