Add changelog for remote store cluster level settings (opensearch-project#7144)

Signed-off-by: Varun Bansal <[email protected]>

Author: linuxpi

CHANGELOG.md

@@ -103,6 +103,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Add retry delay as dynamic setting for cluster maanger throttling. ([#6998](https://github.com/opensearch-project/OpenSearch/pull/6998))
 - Introduce full support for searchable snapshots ([#5087](https://github.com/opensearch-project/OpenSearch/issues/5087))
 - Introduce full support for Segment Replication ([#5147](https://github.com/opensearch-project/OpenSearch/issues/5147))
+- [Remote Store] Add support for enabling Remote Store at Cluster level by default. ([#6932](https://github.com/opensearch-project/OpenSearch/pull/6932))
 
 ### Dependencies
 - Bump `org.apache.logging.log4j:log4j-core` from 2.18.0 to 2.20.0 ([#6490](https://github.com/opensearch-project/OpenSearch/pull/6490))