Add Changelog for 4.9.0 (#364)

CHANGELOG.md

@@ -3,13 +3,18 @@ All notable changes to this project are documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). See the [CONTRIBUTING guide](./CONTRIBUTING.md#Changelog) for instructions on how to add changelog entries.
 
-## [Unreleased 2.x]
+## [Unreleased 4.9.x]
 ### Added
 
+- [Amazon Security Lake integration as source](https://github.com/wazuh/wazuh-indexer/issues/128)
+- [Splunk, OpenSearch and Elastic integrations](https://github.com/wazuh/wazuh-indexer/issues/250)
+
 ### Dependencies
 
 ### Changed
 
+- [Wazuh indexer fork update](https://github.com/wazuh/wazuh-indexer/issues/54)
+
 ### Deprecated
 
 ### Removed
@@ -18,4 +23,4 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ### Security
 
-[Unreleased 2.x]: https://github.com/opensearch-project/OpenSearch/compare/2.12...2.x
+[Unreleased 4.9.x]: https://github.com/wazuh/wazuh-indexer/compare/BASE...4.9.0