org-wikinodes: Update code to new link fontification

* contrib/lisp/org-wikinodes.el (org-wikinodes-add-to-font-lock-keywords):
  Update to change introduced in 2d29269bb1b9af08011e091913798b6598e4b156.

contrib/lisp/org-wikinodes.el

@@ -316,8 +316,7 @@ with working links."
 
 (defun org-wikinodes-add-to-font-lock-keywords ()
   "Add wikinode CamelCase highlighting to `org-font-lock-extra-keywords'."
-  (let ((m (member '(org-activate-plain-links (0 'org-link t))
-		   org-font-lock-extra-keywords)))
+  (let ((m (member '(org-activate-links) org-font-lock-extra-keywords)))
     (if m (push '(org-wikinodes-activate-links) (cdr m))
       (message "Failed to add wikinodes to `org-font-lock-extra-keywords'."))))