docs: Update changelog to include Turkish documentation

Author: Vu4ll

CHANGELOG.md

@@ -4,6 +4,13 @@ All notable changes to `HyDE` will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and this project adheres to _Modified_ [CalVer](https://calver.org/). See [Versioning](https://github.com/HyDE-Project/HyDE/blob/master/RELEASE_POLICY.md#versioning-yymq) For more info
 
+## Changes
+
+### Added
+
+- Turkish documentation.
+- No changes have been made to other codes.
+
 ## v25.8.3
 
 ### Fixed