Fix Wolfplex Phabricator canonical URL

Summary:
The Let's Encrypt certificate canonical domain is phabricator.wolfplex.org,
but nginx configuration had .be as canonical, .org as alias.

This fixes the following issue:

nginx: [emerg] BIO_new_file("/srv/letsencrypt/etc/live/phabricator.wolfplex.be/fullchain.pem")
failed (SSL: error:02001002:system library:fopen:No such file or directory
:fopen('/srv/letsencrypt/etc/live/phabricator.wolfplex.be/fullchain.pem','r')
error:2006D080:BIO routines:BIO_new_file:no such file)

RReviewers: dereckson

Test Plan: Test on docker-001, and fix any certificate issue as the same time.

Reviewers: dereckson

Reviewed By: dereckson

Differential Revision: https://devcentral.nasqueron.org/D2318