Fixed focus shortcut

Fixed the right shortcut and added description

config/sway/modes

@@ -85,7 +85,7 @@ bindsym $alt+end mode "$mode_preferences"
 mode "$mode_preferences" bindsym {
     s exec "~/.scripts/wlsunset.sh", mode "default"
     n exec "~/.scripts/dnd.sh", mode "default"
-    f exec "dunstctl set-paused toggle", mode "default"
+    f exec "~/.scripts/focus.sh", mode "default"
 
     Return      mode "default"
     Escape      mode "default"

scripts/focus.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# Script to toggle black background to focus
+# Script to toggle black background to focus on sway
 
 # Get instances of swaybg, except for the 'standard' one.
 list=$( pgrep swaybg | head -n -1 )