Fix webhook permalink issue.
Fix webhook permalink issue.

Trello card: https://trello.com/c/3q2pgK1f

Signed-off-by: Paul Hughes <a027184a55211cd23e3f3094f1fdc728df5e0500@paulalexanderhughes.com>

ishan576/wordpress-plugin,muut/wordpress-plugin,ishan576/wordpress-plugin,muut/wordpress-plugin