[network-manager-applet] release: update NEWS

[Lubomir Rintel <lkundrak src gnome org>]

commit 981347d33ca121f406e2bc6a37ad2668bb905916
Author: Lubomir Rintel <lkundrak v3 sk>
Date:   Wed May 29 10:49:04 2019 +0200

    release: update NEWS

 NEWS | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
---
diff --git a/NEWS b/NEWS
index d7d1369a..6e91b146 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,17 @@
+=======================================================
+network-manager-applet-1.8.22
+Overview of changes since network-manager-applet-1.8.20
+=======================================================
+
+* The applet's secret agent can now utilize external UI mode for VPN plugins
+  that support it.
+* The Wi-Fi-related items in the applet menu are now sorted more reasonably.
+* Various improvements to the Mobile Wizard and Certificate Chooser
+  usability.
+* Render a QR code in the applet's connection info dialog.
+* Improved the applet's info dialog appearance.
+* Updated translations.
+
 =======================================================
 network-manager-applet-1.8.20
 Overview of changes since network-manager-applet-1.8.18