Log Message:
xfce4-cpugraph-plugin: update to 1.2.7

Fixes builds now that we have libxfce4util 4.18.

Change log:

1.2.7 (2022-11-03)
=====
- Remove code obsoleted by libxfce4util-4.17.2
- Fix GLib warnings occurring with newer xfce4-dev-tools
- Fix intltool lock file bug in make distcheck
- Translation Updates:
  Belarusian, Czech, Malay, Portuguese, Portuguese (Brazil), Russian,
  Turkish, Ukrainian