fix(notification): set app icon with the new libnotify -n / --app-name option (#492)

Since `libnotify` 0.8.8, `notify-send` now differanciate App icons and
notification icons with the former overlapping the later in the bottom
left corner (depending on the underlying notification server
implementation). This looks cool in most cases but looks weird for
Arch-Update (see screenshot below).

Fortunately, `libnotify` 0.8.8 added [a new `-n / --app-icon`
option](https://gitlab.gnome.org/GNOME/libnotify/-/commit/1f3fdd1e4490cb9b9b10b2cdb1a2472212bc67e5)
for `notify-send` that allows to overwrite the App icon (basically what
the `-i / --icon` option used to do before App icons and notification
icons got "separated").

We are therefore switching from the `-i` option to `-n` option with
`notify-send` to preserve the current behavior with latest `libnotify`.

<img width="494" height="145" alt="2026-01-11_23-59"
src="https://github.com/user-attachments/assets/9158f13c-c315-4c93-ba44-2cd85d7db98a"
/>

Author: Antiz96

src/lib/notification.sh

@@ -13,16 +13,16 @@
 if [ "${update_number}" -eq 1 ]; then
 	if [ -z "${last_notif_id}" ]; then
 		# shellcheck disable=SC2154
-		notify-send -p -a "${_name}" -i "${name}_updates-available-${tray_icon_style}" "${_name}" "$(eval_gettext "\${update_number} update available")" -A "run=$(eval_gettext "Run \${_name}")" -A "close=$(eval_gettext "Close")" > "${tmpdir}/notif_param"
+		notify-send -p -a "${_name}" -n "${name}_updates-available-${tray_icon_style}" "${_name}" "$(eval_gettext "\${update_number} update available")" -A "run=$(eval_gettext "Run \${_name}")" -A "close=$(eval_gettext "Close")" > "${tmpdir}/notif_param"
 	else
 		# shellcheck disable=SC2154
-		notify-send -p -r "${last_notif_id}" -a "${_name}" -i "${name}_updates-available-${tray_icon_style}" "${_name}" "$(eval_gettext "\${update_number} update available")" -A "run=$(eval_gettext "Run \${_name}")" -A "close=$(eval_gettext "Close")" > "${tmpdir}/notif_param"
+		notify-send -p -r "${last_notif_id}" -a "${_name}" -n "${name}_updates-available-${tray_icon_style}" "${_name}" "$(eval_gettext "\${update_number} update available")" -A "run=$(eval_gettext "Run \${_name}")" -A "close=$(eval_gettext "Close")" > "${tmpdir}/notif_param"
 	fi
 else
 	if [ -z "${last_notif_id}" ]; then
-		notify-send -p -a "${_name}" -i "${name}_updates-available-${tray_icon_style}" "${_name}" "$(eval_gettext "\${update_number} updates available")" -A "run=$(eval_gettext "Run \${_name}")" -A "close=$(eval_gettext "Close")" > "${tmpdir}/notif_param"
+		notify-send -p -a "${_name}" -n "${name}_updates-available-${tray_icon_style}" "${_name}" "$(eval_gettext "\${update_number} updates available")" -A "run=$(eval_gettext "Run \${_name}")" -A "close=$(eval_gettext "Close")" > "${tmpdir}/notif_param"
 	else
-		notify-send -p -r "${last_notif_id}" -a "${_name}" -i "${name}_updates-available-${tray_icon_style}" "${_name}" "$(eval_gettext "\${update_number} updates available")" -A "run=$(eval_gettext "Run \${_name}")" -A "close=$(eval_gettext "Close")" > "${tmpdir}/notif_param"
+		notify-send -p -r "${last_notif_id}" -a "${_name}" -n "${name}_updates-available-${tray_icon_style}" "${_name}" "$(eval_gettext "\${update_number} updates available")" -A "run=$(eval_gettext "Run \${_name}")" -A "close=$(eval_gettext "Close")" > "${tmpdir}/notif_param"
 	fi
 fi