Merge pull request #5741 from fjordllc/bug/stripe-endpoint

endpoint secretが設定できてなかったのを修正

app/models/webhook.rb

@@ -5,7 +5,7 @@ class << self
     def construct_event(
       payload:,
       signature:,
-      endpoint_secret:
+      endpoint_secret: secret
     )
 
       Stripe::Webhook.construct_event(
@@ -29,5 +29,11 @@ def intent_url(intent_id)
         "#{base_url}test/payments/#{intent_id}"
       end
     end
+
+    private
+
+    def secret
+      Rails.application.secrets['stripe']['endpoint_secret']
+    end
   end
 end