Update ChangeLog

Author: vitalijr2

changelog.md

@@ -4,6 +4,9 @@ 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).
 
+## Unreleased
+- Update dependencies
+
 ## 2.1.0 - 2022-08-01
 ### Changed
 - Custom level and marker separators