Fix missing class in webhook code

CRM/Core/Payment/Stripe.php

 <?php
-
-/*
- * Payment Processor class for Stripe
+/**
+ * https://civicrm.org/licensing
  */
 
+/**
+ * Class CRM_Core_Payment_Stripe
+ */
 class CRM_Core_Payment_Stripe extends CRM_Core_Payment {
 
   use CRM_Core_Payment_StripeTrait;

CRM/Stripe/Webhook.php

@@ -22,7 +22,7 @@ class CRM_Stripe_Webhook {
     foreach ($result['values'] as $paymentProcessor) {
       $webhook_path = self::getWebhookPath($paymentProcessor['id']);
 
-      \Stripe::setApiKey(CRM_Core_Payment_Stripe::getSecretKey($paymentProcessor));
+      \Stripe\Stripe::setApiKey(CRM_Core_Payment_Stripe::getSecretKey($paymentProcessor));
       try {
         $webhooks = \Stripe\WebhookEndpoint::all(["limit" => 100]);
       }