sysutils/conky: enable Wayland support after 481978c0272e

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)