Fix GNOME's OOM notification module

Quoting @segfault from #7782 (comment 231779):

Since gnome-settings-daemon 43.0 (which is included in Tails 6.0), the org.gnome.SettingsDaemon.Housekeeping.service contains an OOM notification module which should display GNOME Shell notifications when a process is OOM-killed. Note that this work is independent from systemd-oomd. It listens on the PropertiesChanged signal of org.freedesktop.systemd1 on the session bus and checks if any systemd services/scopes included in that signal have Result=oom-kill. systemd tries to also set Result=oom-kill when the kernel OOM kills a process but I noticed recently that it sometimes sets Result=killed instead in that case.

This MR upgrades gnome-settings-daemon to 43.0-4.0tails1, which includes the patch from #7782 (comment 232065).

refs #7782