Add changelog entry for Wazuh indexer component update

Author: ayodeko

CHANGELOG.md

@@ -15,6 +15,7 @@ All notable changes to this project will be documented in this file.
 - **Post-release**: Updated the *Navigating the Wazuh dashboard* section. ([#8950](https://github.com/wazuh/wazuh-documentation/pull/8950))
 - **Post-release**: Updated the System inventory documentation. ([#8955](https://github.com/wazuh/wazuh-documentation/pull/8955))
 - **Post-release**: Updated the Wazuh server section in the *Getting started* guide. ([#8963](https://github.com/wazuh/wazuh-documentation/pull/8963))
+- **Post-release**: Updated the Wazuh indexer section in the *Getting started* guide. ([#8965](https://github.com/wazuh/wazuh-documentation/pull/8965))
 
 ### Fixed