update changelog

Signed-off-by: xil <fridalu66@gmail.com>

Author: lucy66hw

CHANGELOG.md

@@ -23,7 +23,6 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Implement GRPC Search params `Highlight`and `Sort` ([#19868](https://github.com/opensearch-project/OpenSearch/pull/19868))
 - Implement GRPC ConstantScoreQuery, FuzzyQuery, MatchBoolPrefixQuery, MatchPhrasePrefix, PrefixQuery, MatchQuery ([#19854](https://github.com/opensearch-project/OpenSearch/pull/19854))
 - Add async periodic flush task support for pull-based ingestion ([#19878](https://github.com/opensearch-project/OpenSearch/pull/19878))
-- Implement GRPC FunctionScoreQuery
 - Implement GRPC FunctionScoreQuery ([#19888](https://github.com/opensearch-project/OpenSearch/pull/19888))
 
 ### Changed