Add 2.19.1 release notes

Signed-off-by: Andriy Redko <drreta@gmail.com>

Author: reta

CHANGELOG.md

@@ -5,18 +5,14 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased 2.x]
 ### Added
-- Add execution_hint to cardinality aggregator request - backport to 2.19 (#[17420](https://github.com/opensearch-project/OpenSearch/pull/17420))
 
 ### Dependencies
-- Bump netty from 4.1.117.Final to 4.1.118.Final ([#17320](https://github.com/opensearch-project/OpenSearch/pull/17320))
-- Bump `jetty` version from 9.4.55.v20240627 to 9.4.57.v20241219
 
 ### Deprecated
 
 ### Removed
 
 ### Fixed
-- Fix HTTP API calls that hang with 'Accept-Encoding: zstd' ([#17408](https://github.com/opensearch-project/OpenSearch/pull/17408))
 
 ### Security
 

release-notes/opensearch.release-notes-2.19.1.md

@@ -0,0 +1,16 @@
+## 2025-02-27 Version 2.19.1 Release Notes
+
+## [2.19.1]
+### Added
+- Add execution_hint to cardinality aggregator request (#[17420](https://github.com/opensearch-project/OpenSearch/pull/17420))
+
+### Dependencies
+- Bump netty from 4.1.117.Final to 4.1.118.Final ([#17320](https://github.com/opensearch-project/OpenSearch/pull/17320))
+- Bump `jetty` version from 9.4.55.v20240627 to 9.4.57.v20241219
+
+### Changed
+
+### Deprecated
+
+### Fixed
+- Fix HTTP API calls that hang with 'Accept-Encoding: zstd' ([#17408](https://github.com/opensearch-project/OpenSearch/pull/17408))