Include a single changelog entry for all rw separation PRs.

Signed-off-by: Marc Handalian <marc.handalian@gmail.com>

CHANGELOG.md

@@ -39,7 +39,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - [Workload Management] Add rejection logic for co-ordinator and shard level requests ([#15428](https://github.com/opensearch-project/OpenSearch/pull/15428)))
 - Adding translog durability validation in index templates ([#15494](https://github.com/opensearch-project/OpenSearch/pull/15494))
 - Add index creation using the context field ([#15290](https://github.com/opensearch-project/OpenSearch/pull/15290))
-- [Reader Writer Separation] Add searchOnly replica routing configuration ([#15410](https://github.com/opensearch-project/OpenSearch/pull/15410))
+- [Reader Writer Separation] Add experimental search replica shard type to achieve reader writer separation ([#15237](https://github.com/opensearch-project/OpenSearch/pull/15237))
 - [Range Queries] Add new approximateable query framework to short-circuit range queries ([#13788](https://github.com/opensearch-project/OpenSearch/pull/13788))
 - [Workload Management] Add query group level failure tracking ([#15227](https://github.com/opensearch-project/OpenSearch/pull/15527))
 - Add support for pluggable deciders for concurrent search ([#15363](https://github.com/opensearch-project/OpenSearch/pull/15363))
@@ -53,7 +53,6 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - ClusterManagerTaskThrottler Improvements ([#15508](https://github.com/opensearch-project/OpenSearch/pull/15508))
 - Reset DiscoveryNodes in all transport node actions request ([#15131](https://github.com/opensearch-project/OpenSearch/pull/15131))
 - Relax the join validation for Remote State publication ([#15471](https://github.com/opensearch-project/OpenSearch/pull/15471))
-- [Reader Writer Separation] Add Segment Replication polling for search replicas ([#15627](https://github.com/opensearch-project/OpenSearch/pull/15627))
 
 ### Dependencies
 - Bump `netty` from 4.1.111.Final to 4.1.112.Final ([#15081](https://github.com/opensearch-project/OpenSearch/pull/15081))