sysutils/conky: enable Wayland support after 481978c0

See out_to_wayland in conky(1) manpage or

  $ fgrep -A3 wayland /usr/local/share/doc/conky/config_settings.yaml
    - name: out_to_wayland
      desc: |-
	Open a Wayland window to display output.
      default: no

PR:		268597
Inspired by:	Alpine Linux
Approved by:	madpilot (maintainer)