Add changelog

Signed-off-by: xuxiong1 <[email protected]>

Author: xuxiong1

CHANGELOG.md

@@ -35,6 +35,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Support pull-based ingestion message mappers and raw payload support ([#19765](https://github.com/opensearch-project/OpenSearch/pull/19765))
 - Add search API tracker ([#18601](https://github.com/opensearch-project/OpenSearch/pull/18601))
 - Support dynamic consumer configuration update in pull-based ingestion ([#19963](https://github.com/opensearch-project/OpenSearch/pull/19963))
+- Add support for forward translog reading ([#20163](https://github.com/opensearch-project/OpenSearch/pull/20163)
 
 ### Changed
 - Combining filter rewrite and skip list to optimize sub aggregation([#19573](https://github.com/opensearch-project/OpenSearch/pull/19573))