docs(CHANGELOG): update

Author: jcs090218

CHANGELOG.md

@@ -11,6 +11,7 @@ Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how
 * Allow latest version return `nil` value if fails.
 * Fix server installation on Unix system (#20)
 * Allow globally installed language server (#23)
+* Implement code actions for "Add to dictionary", "Disable rule" and "Hide false positive" (#26)
 
 ## 0.2.0
 > Released Aug 26, 2021