Add update to change log on the link opening behavior

CHANGELOG.md

@@ -8,6 +8,8 @@
     * Clicking on the "Home" button if you already are on that screen scrolls to the top.
     * Auto-complete suggestions for hashtags and accounts render at the top of the edit text field not bottom.
     * Contacts screen shows user's handle and last post time (as far as your server knows about) for the user
+    * Links now open in the system browser on iOS and Android like on the desktop rather than within the app as an
+      embedded browser
 * Fixes
     * Seemingly disappearing contacts on Contacts screen have been corrected.
 * New Features