Update Changelog

Author: countzero

CHANGELOG.md

@@ -4,6 +4,19 @@ All notable changes to this project will be 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).
 
+## [1.6.0] - 2024-07-12
+
+### Added
+- Add training data chunk environment variable
+
+### Changed
+- Enable importance matrix for all quant formats
+- Always compute an imatrix file
+- Update documentation about quantization
+
+### Fixed
+- Fix renaming of convert python script from llama.cpp
+
 ## [1.5.0] - 2024-06-20
 
 ### Added