[network-manager-applet] release: update NEWS

[Thomas Haller <thaller src gnome org>]

commit ab6922199aca4424c709ecce8cdc72749f9a44b9
Author: Thomas Haller <thaller redhat com>
Date:   Wed Feb 3 09:45:21 2021 +0100

    release: update NEWS

 NEWS | 11 +++++++++++
 1 file changed, 11 insertions(+)
---
diff --git a/NEWS b/NEWS
index 925a3800..464753d6 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,14 @@
+=======================================================
+network-manager-applet-1.20.0
+Overview of changes since network-manager-applet-1.18.0
+=======================================================
+
+* Use wireless-security code from libnma
+* Add flatpak build configuration
+* applet: hide unmanaged ethernet devices in nm-applet
+* applet: fix Wi-Fi scan requests with appindicator
+* editor: fix drop down list for connection.secondaries
+
 =======================================================
 network-manager-applet-1.18.0
 Overview of changes since network-manager-applet-1.16.0