debos: gnome-desktop: Add the network management GNOME package

Install the network management framework (GNOME frontend), a system network
service that manages your network devices and connections.
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>

tools/debos/images/gnome-desktop/gnome-desktop.yaml

@@ -42,6 +42,7 @@ actions:
     description: Install the default graphic environment
     packages:
       - task-gnome-desktop
+      - network-manager-gnome
       - chromium
 
   - action: overlay