add CHANGELOG

Signed-off-by: guojialiang <guojialiang.2012@bytedance.com>

Author: guojialiang92

CHANGELOG.md

@@ -41,6 +41,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Unwrap singleton DocValues in date histogram aggregation. ([#17643](https://github.com/opensearch-project/OpenSearch/pull/17643))
 - Introduce 512 byte limit to search and ingest pipeline IDs ([#17786](https://github.com/opensearch-project/OpenSearch/pull/17786))
 - Avoid skewed segment replication lag metric ([#17831](https://github.com/opensearch-project/OpenSearch/pull/17831))
+- Increase the default segment counter step size when replica promoting ([#17568](https://github.com/opensearch-project/OpenSearch/pull/17568))
 
 ### Dependencies
 - Bump `com.nimbusds:nimbus-jose-jwt` from 9.41.1 to 10.0.2 ([#17607](https://github.com/opensearch-project/OpenSearch/pull/17607), [#17669](https://github.com/opensearch-project/OpenSearch/pull/17669))