update CHANGELOG.md

Signed-off-by: Sotaro Hikita <[email protected]>

Author: lawofcycles

CHANGELOG.md

@@ -30,6 +30,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Fix pull-based ingestion out-of-bounds offset scenarios and remove persisted offsets ([#19607](https://github.com/opensearch-project/OpenSearch/pull/19607))
 - [Star Tree] Fix sub-aggregator casting for search with profile=true ([19652](https://github.com/opensearch-project/OpenSearch/pull/19652))
 - Fix issue with updating core with a patch number other than 0 ([#19377](https://github.com/opensearch-project/OpenSearch/pull/19377))
+- Fix NullPointerException when restoring remote snapshot with missing shard size information ([#19684](https://github.com/opensearch-project/OpenSearch/pull/19684))
 
 ### Dependencies
 - Update to Gradle 9.1 ([#19575](https://github.com/opensearch-project/OpenSearch/pull/19575))