[geary/mjog/account-command-stacks] Update appstream to mention improved undo support

[Michael Gratton <mjog src gnome org>]

commit dbb4fc8278eb79b45f2ab99a0f7774f0bced701f
Author: Michael Gratton <mike vee net>
Date:   Tue Nov 5 11:57:48 2019 +1100

    Update appstream to mention improved undo support

 desktop/org.gnome.Geary.appdata.xml.in.in | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/desktop/org.gnome.Geary.appdata.xml.in.in b/desktop/org.gnome.Geary.appdata.xml.in.in
index 3b516f80..2cbf24d5 100644
--- a/desktop/org.gnome.Geary.appdata.xml.in.in
+++ b/desktop/org.gnome.Geary.appdata.xml.in.in
@@ -93,6 +93,7 @@
       <description>
         <p>Enhancements included in this release:</p>
         <ul>
+          <li>Improved and pervasive undo support for email actions</li>
           <li>App-wide notification preferences now handled by desktop</li>
           <li>Improved missing attachment detection in composer</li>
           <li>Initial plugin system</li>