Update release date

Author: pfrischmuth

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/) as of version 1.0.0.
 
-## [1.0.0] - 2016-09-12
+## [1.0.0] - 2016-09-26
 
 ### Added
 - Add a help text for the filter module