Update CHANGELOG.md about tags opening up in app

CHANGELOG.md

@@ -12,6 +12,8 @@
     * Support for toggling if a tag is being followed or not
     * A tags search result screen that lists posts/comments that follow that tag and allows
       following/unfollowing tags
+    * Clicking on a tag defaults to opening up the tags search screen in the app. There is a setting
+      to toggle this back to opening up on the user's home server's search screen in the browser.
 
 ## Version 0.14.0 (beta)