Use consistent bash5 style for conditionals and quoting

bin/omarchy-toggle-nightlight

@@ -19,7 +19,7 @@ restart_nightlighted_waybar() {
   fi
 }
 
-if [[ "$CURRENT_TEMP" == "$OFF_TEMP" ]]; then
+if [[ $CURRENT_TEMP == $OFF_TEMP ]]; then
   hyprctl hyprsunset temperature $ON_TEMP
   notify-send "  Nightlight screen temperature"
   restart_nightlighted_waybar