Add Change Log

Signed-off-by: Jean Kim <bgshhd95@gmail.com>

Author: pado0

CHANGELOG.md

@@ -46,6 +46,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Pass registry of headers from ActionPlugin.getRestHeaders to ActionPlugin.getRestHandlerWrapper ([#19875](https://github.com/opensearch-project/OpenSearch/pull/19875))
 - Refactor the Condition.Stats and DirectoryFileTransferTracker.Stats class to use the Builder pattern instead of constructors ([#19862](https://github.com/opensearch-project/OpenSearch/pull/19862))
 - Refactor the RemoteTranslogTransferTracker.Stats and RemoteSegmentTransferTracker.Stats class to use the Builder pattern instead of constructors ([#19837](https://github.com/opensearch-project/OpenSearch/pull/19837))
+- Refactor the FieldDataStats and CompletionStats class to use the Builder pattern instead of constructors ([#19936](https://github.com/opensearch-project/OpenSearch/pull/19936))
 
 ### Fixed
 - Fix Allocation and Rebalance Constraints of WeightFunction are incorrectly reset ([#19012](https://github.com/opensearch-project/OpenSearch/pull/19012))
@@ -96,6 +97,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Deprecated existing constructors in DocStats and StoreStats in favor of the new Builder ([#19863](https://github.com/opensearch-project/OpenSearch/pull/19863))
 - Deprecated existing constructors in Condition.Stats and DirectoryFileTransferTracker.Stats in favor of the new Builder ([#19862](https://github.com/opensearch-project/OpenSearch/pull/19862))
 - Deprecated existing constructors in RemoteTranslogTransferTracker.Stats and RemoteSegmentTransferTracker.Stats in favor of the new Builder ([#19837](https://github.com/opensearch-project/OpenSearch/pull/19837))
+- Deprecated existing constructors in FieldDataStats and CompletionStats in favor of the new Builder ([#19936](https://github.com/opensearch-project/OpenSearch/pull/19936))
 
 ### Removed