[fractal] release: mention header bar in notes

[Daniel Garcia Moreno <danigm src gnome org>]

commit 899583c34c5a76e1f51f801226d24291c9f23133
Author: Alexandre Franke <alexandre franke gmail com>
Date:   Tue Dec 18 09:48:10 2018 +0100

    release: mention header bar in notes

 fractal-gtk/res/org.gnome.Fractal.appdata.xml.in.in | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/fractal-gtk/res/org.gnome.Fractal.appdata.xml.in.in 
b/fractal-gtk/res/org.gnome.Fractal.appdata.xml.in.in
index 661cf5f..8807555 100644
--- a/fractal-gtk/res/org.gnome.Fractal.appdata.xml.in.in
+++ b/fractal-gtk/res/org.gnome.Fractal.appdata.xml.in.in
@@ -24,6 +24,7 @@
         <p>New features:</p>
         <ul>
           <li>Enhanced history view with adaptive layout, day divider</li>
+          <li>Reorganised headerbar, app menu merged with user menu</li>
           <li>Larger display of emoji-only messages</li>
           <li>Some performance improvements</li>
          <li>Opening a room jumps to first unread message</li>