Update generated code for v1154

OPENAPI_VERSION

@@ -1 +1 @@
-v1152
+v1154

lib/stripe/resources/checkout/session.rb

@@ -20,6 +20,7 @@ module Stripe
     class Session < APIResource
       extend Stripe::APIOperations::Create
       extend Stripe::APIOperations::List
+      include Stripe::APIOperations::Save
 
       OBJECT_NAME = "checkout.session"
       def self.object_name
@@ -89,6 +90,16 @@ module Stripe
           opts: opts
         )
       end
+
+      # Updates a Session object.
+      def self.update(id, params = {}, opts = {})
+        request_stripe_object(
+          method: :post,
+          path: format("/v1/checkout/sessions/%<id>s", { id: CGI.escape(id) }),
+          params: params,
+          opts: opts
+        )
+      end
     end
   end
 end