Add 2.19.1 release notes (#17468)

Signed-off-by: Andriy Redko <drreta@gmail.com>
(cherry picked from commit 2e4741f)

Author: reta

CHANGELOG.md

@@ -20,7 +20,6 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Bump `com.google.code.gson:gson` from 2.11.0 to 2.12.1 ([#17229](https://github.com/opensearch-project/OpenSearch/pull/17229))
 - Bump `org.jruby.joni:joni` from 2.2.1 to 2.2.3 ([#17136](https://github.com/opensearch-project/OpenSearch/pull/17136))
 - Bump `org.apache.ant:ant` from 1.10.14 to 1.10.15 ([#17288](https://github.com/opensearch-project/OpenSearch/pull/17288))
-- Bump netty from 4.1.117.Final to 4.1.118.Final ([#17320](https://github.com/opensearch-project/OpenSearch/pull/17320))
 - Bump `reactor_netty` from 1.1.26 to 1.1.27 ([#17322](https://github.com/opensearch-project/OpenSearch/pull/17322))
 - Bump `me.champeau.gradle.japicmp` from 0.4.5 to 0.4.6 ([#17375](https://github.com/opensearch-project/OpenSearch/pull/17375))
 - Bump `com.google.api.grpc:proto-google-common-protos` from 2.37.1 to 2.52.0 ([#17379](https://github.com/opensearch-project/OpenSearch/pull/17379))
@@ -40,7 +39,6 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Fix exists queries on nested flat_object fields throws exception ([#16803](https://github.com/opensearch-project/OpenSearch/pull/16803))
 - Add highlighting for wildcard search on `match_only_text` field ([#17101](https://github.com/opensearch-project/OpenSearch/pull/17101))
 - Fix illegal argument exception when creating a PIT ([#16781](https://github.com/opensearch-project/OpenSearch/pull/16781))
-- 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))