Prepare 3.7.0 release (#1911)

* Prepare 3.7.0 release

Signed-off-by: Nathalie Jonathan <nathhjo@amazon.com>

* Include new 3.x changes

---------

Signed-off-by: Nathalie Jonathan <nathhjo@amazon.com>
Co-authored-by: Thomas Farr <tfarr@atlassian.com>

Author: nathaliellenaa

CHANGELOG.md

@@ -3,13 +3,8 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
 ## [Unreleased 3.x]
 ### Added
-- Add msearch `allow_partial_results` flag ([#1904](https://github.com/opensearch-project/opensearch-java/pull/1904))
-
 
 ### Dependencies
-- Bump `com.github.jk1.dependency-license-report` from 3.0.1 to 3.1.1 ([#1895](https://github.com/opensearch-project/opensearch-java/pull/1895), [#1896](https://github.com/opensearch-project/opensearch-java/pull/1896))
-- Bump `org.apache.httpcomponents.core5:httpcore5` from 5.4 to 5.4.1 ([#1883](https://github.com/opensearch-project/opensearch-java/pull/1883))
-- Bump `com.carrotsearch.randomizedtesting:randomizedtesting-runner` from 2.8.3 to 2.8.4 ([#1882](https://github.com/opensearch-project/opensearch-java/pull/1882))
 
 ### Changed
 
@@ -18,7 +13,6 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 ### Removed
 
 ### Fixed
-- Fix NPEs while converting transport options when null options, headers, or query parameters are provided ([#1887](https://github.com/opensearch-project/opensearch-java/pull/1888))
 
 ### Security
 
@@ -37,6 +31,26 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
 ### Security
 
+## [3.7.0] - 03/03/2026
+### Added
+- Add msearch `allow_partial_results` flag ([#1904](https://github.com/opensearch-project/opensearch-java/pull/1904))
+
+### Dependencies
+- Bump `com.github.jk1.dependency-license-report` from 3.0.1 to 3.1.1 ([#1895](https://github.com/opensearch-project/opensearch-java/pull/1895), [#1896](https://github.com/opensearch-project/opensearch-java/pull/1896))
+- Bump `org.apache.httpcomponents.core5:httpcore5` from 5.4 to 5.4.1 ([#1883](https://github.com/opensearch-project/opensearch-java/pull/1883))
+- Bump `com.carrotsearch.randomizedtesting:randomizedtesting-runner` from 2.8.3 to 2.8.4 ([#1882](https://github.com/opensearch-project/opensearch-java/pull/1882))
+
+### Changed
+
+### Deprecated
+
+### Removed
+
+### Fixed
+- Fix NPEs while converting transport options when null options, headers, or query parameters are provided ([#1887](https://github.com/opensearch-project/opensearch-java/pull/1888))
+
+### Security
+
 ## [3.6.0] - 02/11/2026
 ### Added