GNOME backups: s/choose/palette, combobox has been decommissioned

roles/gnome_backups/tasks/main.yml

@@ -32,7 +32,7 @@
   - view.gnome.org
   - puppet.gnome.org
   - extensions.gnome.org
-  - chooser.gnome.org
+  - palette.gnome.org
   - git.gnome.org
   - webapps.gnome.org
   - socket.gnome.org
@@ -43,7 +43,6 @@
   - spinner.gnome.org
   - master.gnome.org
   - live.gnome.org
-  - combobox.gnome.org
   - restaurant.gnome.org
   - expander.gnome.org
   - accelerator.gnome.org