Set dillo as browser for dunst

Not that I ever use it, so better set something harmless

dotfiles/config/dunst/dunstrc

@@ -21,7 +21,7 @@
     separator_color = frame
     startup_notification = true
     dmenu = /usr/bin/dmenu -p dunst:
-    browser = ub
+    browser = dillo
     frame_width = 3
     frame_color = "#aaaaaa"