Issue #1890502 follow-up by Wim Leers: WYSIWYG: Add CHANGELOG.txt entry for CKEditor.

core/CHANGELOG.txt

@@ -15,6 +15,7 @@ Drupal 8.0, xxxx-xx-xx (development version)
     * Implements functionality to get, set, add and remove configuration.
     * Includes ability to override configuration values with language variants
       and other runtime values.
+- Added the CKEditor WYSIWYG editor. Provides a drag-and-drop configuration UI.
 - Included the HTML5 Shiv library to support HTML5 elements in IE 8 and below.
 - Included the following Symfony2 components:
     * ClassLoader - PSR-0-compatible autoload routines.