add changelog

Signed-off-by: Asim Mahmood <asim.seng@gmail.com>

Author: asimmahmood1

CHANGELOG.md

@@ -11,6 +11,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Add a toBuilder method in EngineConfig to support easy modification of configs([#19054](https://github.com/opensearch-project/OpenSearch/pull/19054))
 - Add StoreFactory plugin interface for custom Store implementations([#19091](https://github.com/opensearch-project/OpenSearch/pull/19091))
 - Add a dynamic setting to change skip_cache_factor and min_frequency for querycache ([#18351](https://github.com/opensearch-project/OpenSearch/issues/18351))
+- Add skip_list param for scaled float and token count fields ([#19142](https://github.com/opensearch-project/OpenSearch/pull/19142))
 
 ### Changed
 - Add CompletionStage variants to methods in the Client Interface and default to ActionListener impl ([#18998](https://github.com/opensearch-project/OpenSearch/pull/18998))