Log Message:
xfce4-cpugraph-plugin: update to 1.2.8

Change log:

1.2.8 (2023-07-22)
=====
- Update authors
- Add option to enable / disable SMT statistics (disabled by default)
- Migrate to Xfconf
- Move settings functions into namespace
- Require Xfconf library
- Add 24px icon, cleanup SVG metadata
- Update copyright year
- Display detailed CPU load on Linux
- Improve tooltip
- build: Add GLib requirement
- Translation Updates:
  Albanian, Arabic, Armenian (Armenia), Basque, Belarusian, Bulgarian,
  Catalan, Chinese (China), Chinese (Taiwan), Croatian, Czech, Danish,
  Dutch, Eastern Armenian, English (Australia), English (Canada),
  English (United Kingdom), Estonian, Finnish, French, Galician,
  German, Greek, Hebrew, Hungarian, Icelandic, Indonesian, Interlingue,
  Italian, Japanese, Kazakh, Korean, Lithuanian, Malay, Norwegian
  Bokmål, Occitan (post 1500), Polish, Portuguese, Portuguese
  (Brazil), Russian, Serbian, Slovak, Slovenian, Spanish, Swedish,
  Thai, Turkish, Ukrainian, Uyghur