Add missing entry for 2.11 release notes (#10679) (#10719)

(cherry picked from commit 5ec2fe9)

Signed-off-by: Kunal Kotwani <kkotwani@amazon.com>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

release-notes/opensearch.release-notes-2.11.0.md

@@ -5,6 +5,7 @@
 ### Added
 - Add coordinator level stats for search latency ([#8386](https://github.com/opensearch-project/OpenSearch/issues/8386))
 - Add metrics for thread_pool task wait time ([#9681](https://github.com/opensearch-project/OpenSearch/pull/9681))
+- Add parallel file download support for remote store based replication ([#8596](https://github.com/opensearch-project/OpenSearch/pull/8596)) 
 - Async blob read support for S3 plugin ([#9694](https://github.com/opensearch-project/OpenSearch/pull/9694))
 - [Telemetry-Otel] Added support for OtlpGrpcSpanExporter exporter ([#9666](https://github.com/opensearch-project/OpenSearch/pull/9666))
 - Async blob read support for encrypted containers ([#10131](https://github.com/opensearch-project/OpenSearch/pull/10131))