Add kitty to the list of available backends

neofetch

@@ -4551,7 +4551,7 @@ BARS:
 IMAGE BACKEND:
     --backend backend           Which image backend to use.
                                 Possible values: 'ascii', 'caca', 'chafa', 'jp2a', 'iterm2',
-                                'off', 'sixel', 'tycat', 'w3m'
+                                'off', 'sixel', 'tycat', 'w3m', 'kitty'
     --source source             Which image or ascii file to use.
                                 Possible values: 'auto', 'ascii', 'wallpaper', '/path/to/img',
                                 '/path/to/ascii', '/path/to/dir/', 'command output' [ascii]