Update CHANGEOG

CHANGELOG.md

@@ -11,10 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * ext_bottom_line module (v0.1 - Experimental)
     * A module which adds a preview section where any kind of summarizing
       information (like plots, video players, thumbnails...) can be shown.
-    * Apart from some limitted standard configuration for images and videos,
-      the content of the preview section (the bottom line) has to be configured
-      in `conf/ext/json/ext_bottom_line.json`. An example configuration with
-      made-up entities is located in `conf/core/json/ext_bottom_line.json`.
+    * Enable with build property `BUILD_MODULE_EXT_BOTTOM_LINE=ENABLED`.
     * More documentation in `src/core/js/ext_bottom_line.js`.
 * Map (v0.3)
     * Adds a button to the navbar which toggles a map in the top of the main