wallpaper: rename wallpaper binary to match service name

README.md

@@ -6,7 +6,7 @@ recommend using it as-is by you can pick anything you need in it.
 
 Here some of the things you may be interested in:
 
- - I use a Python script `bin/build-wallpaper` to build the wallpaper
+ - I use a Python script `bin/wallpaper` to build the wallpaper
    to be displayed. There is a random selection and it works with
    multihead setup. It seems that classic tools are now able to change
    the wallpaper per screen and therefore, the script may seem a bit

dotfiles/systemd/wallpaper.service

@@ -6,7 +6,7 @@ PartOf=graphical-session.target
 Environment=WALLPAPER_DIRECTORY=%h/.config/i3/wallpapers
 Environment=WALLPAPER_OUTPUT=%h/.cache/i3/current-wallpaper.png
 ExecStart=/usr/bin/mkdir -p %h/.cache/i3
-ExecStart=%h/.config/i3/bin/build-wallpaper --crop \
+ExecStart=%h/.config/i3/bin/wallpaper --crop \
                                       --directory $WALLPAPER_DIRECTORY \
                                       --target $WALLPAPER_OUTPUT
 ExecStart=/usr/bin/hsetroot -center $WALLPAPER_OUTPUT