fix(api/newsletter): skip authenticity token verification for newsletter subscription creation

Author: cabaktom

app/controllers/folio/api/newsletter_subscriptions_controller.rb

@@ -4,6 +4,7 @@ class Folio::Api::NewsletterSubscriptionsController < Folio::Api::BaseController
   include Folio::RequiresSession
   include Folio::Captcha::HasTurnstileValidation
 
+  skip_before_action :verify_authenticity_token, only: [:create]
   requires_session_for :newsletter_subscription, only: [:create]
 
   def create