xfce4-systemload-plugin: upgrade 1.2.3 -> 1.2.4

Release notes for 1.2.4
=======================
- Allow compilation with panel 4.15+
- Fix missing-prototypes
- Remove GSourceFunc casts
- Fix the properties dialog and a hidden memory corruption
- Avoid repainting bars if there are no visual changes
- Update copyright year
- Update URLs
- Create README.md and update configure.ac.in
- Add basic GitLab pipeline
- Update URLs from goodies.x.o to docs.x.o (Bug #16178)
- Translation Updates:
  Albanian, Arabic, 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,
  Korean, Latvian, Lithuanian, Malay, Norwegian Bokmål, Occitan (post
  1500), Polish, Portuguese, Portuguese (Brazil), Russian, Serbian,
  Slovak, Slovenian, Spanish, Swedish, Thai, Turkish, Ukrainian, Urdu,
  Urdu (Pakistan), Uyghur

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-xfce/recipes-panel-plugins/systemload/xfce4-systemload-plugin_1.2.4.bb

@@ -7,5 +7,4 @@ inherit xfce-panel-plugin
 
 DEPENDS += "upower"
 
-SRC_URI[md5sum] = "5d75865be699d0b3d36a5fc17ed02d44"
-SRC_URI[sha256sum] = "052407c575203da4de2db6f4a5e997220d95ec655d393dc3875a0d5a20520775"
+SRC_URI[sha256sum] = "0531b8df923cba3be8d064cb8b638b954df74915e5a447228999517847789835"