Updated CHANGELOG.md

Author: Satoshi-Sh

CHANGELOG.md

@@ -178,6 +178,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
   - Decorations/Bracket
   - Decorations/Stick
   - TwoColumn
+  - Layout
 - Extracted :root from themes.scss to globals.scss
 - Updated ContactUsForm's checkbox wrapper from div to label to enhance its accessibility
 - Updated SearchInput width to 100% for better styling