community/gnome-system-monitor: upgrade to 46.0
- https://download.gnome.org/sources/gnome-system-monitor/46/gnome-system-monitor-46.alpha.news
- https://download.gnome.org/sources/gnome-system-monitor/46/gnome-system-monitor-46.beta.news
- https://download.gnome.org/sources/gnome-system-monitor/46/gnome-system-monitor-46.rc.news
- https://download.gnome.org/sources/gnome-system-monitor/46/gnome-system-monitor-46.0.news
part of #15863 (closed)