lemonbar: update workspaces to newer version of i3ipc.

Also temporary placeholders in conky for battery and screen brightness
when on desktop

.i3/lemonbar/conky_slow

@@ -1,4 +1,4 @@
- -- Conky for external bar 
+ -- Conky for external bar
  --  out simple text to console
 
 conky.config = {
@@ -20,7 +20,7 @@ ${cpu} \
 ${mem} \
 ${fs_used_perc /} \
 ${fs_used_perc /home} \
-${exec ~/.i3/lemonbar/get_bat.sh} \
-${exec brillo} \
+F100 \
+100.00 \
 ${exec /home/kuba/.i3/scripts/lang.sh show}
 ]]