Update dunstrc for newer version

dotfiles/config/dunst/dunstrc

 [global]
     font = Monospace 8
-    allow_markup = yes
+    markup = full
     format = "%a:%p <b>%s</b>\n%b"
     sort = yes
     indicate_hidden = yes
     startup_notification = true
     dmenu = /usr/bin/dmenu -p dunst:
     browser = ub
-
-[frame]
-    width = 3
-    color = "#aaaaaa"
+    frame_width = 3
+    frame_color = "#aaaaaa"
 
 [shortcuts]
     close = ctrl+space