Update 4.12 changelog

Author: javimed

CHANGELOG.md

@@ -45,6 +45,7 @@ All notable changes to this project will be documented in this file.
 - **Post-release**: Added steps to export and import dashboard customizations in the upgrade guide. ([#8618](https://github.com/wazuh/wazuh-documentation/pull/8618))
 - **Post-release**: Updated the vulnerability detection capability section. ([#8693](https://github.com/wazuh/wazuh-documentation/pull/8693))
 - **Post-release**: Changed the warning note on using the `$` and `&` characters when changing passwords in Docker deployments. ([#8694](https://github.com/wazuh/wazuh-documentation/pull/8694))
+- **Post-release**: Changed Windows commands in the backup guide to PowerShell. ([#8761](https://github.com/wazuh/wazuh-documentation/pull/8761))
 
 ### Fixed