Improve wording in changelog

Author: Karneades

CHANGELOG.md

@@ -8,7 +8,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 This release **adds new commands for exporting (downlading) the files archive from a flow or
 a hunt**, **adds support in FileFinder flow for collecting locked files
-using raw file access** and the well known _stat_ action type and finally,
+using raw file access** and the _stat_ action type and finally,
 **fixes the artifact upload mechanism required by newer GRR releases**.
 
 ### Added