Add changelog entry

Signed-off-by: Alexei Karikov <karikov.alist.ru@gmail.com>

Author: Nicksqain

CHANGELOG.md

@@ -212,6 +212,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Fix EUI/OUI type errors ([#3798](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3798))
 - Remove unused Sass in `tile_map` plugin ([#4110](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/4110))
 - [Table Visualization] Remove custom styling for text-align:center in favor of OUI utility class. ([#4164](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/4164))
+- Replace the use of `bluebird` in `saved_objects` plugin ([#4026](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/4026))
 
 ### 🔩 Tests