update change log (#23)

* update changelog

* fix typo

CHANGELOG.md

@@ -24,6 +24,7 @@ All notable changes to the "vscode-maven" extension will be documented in this f
         - [0.0.1](#001)
 
 ## Unreleased
+- Supported to auto-update maven project explorer tree view when pom.xml has been created/modified/removed.
 
 ## Released
 ### 0.5.2