Update generated code (#1430)

* Update generated code for v1121

* Update generated code for v1126

---------

Co-authored-by: Stripe OpenAPI <105521251+stripe-openapi[bot]@users.noreply.github.com>
Co-authored-by: helenye-stripe <111009531+helenye-stripe@users.noreply.github.com>

OPENAPI_VERSION

@@ -1 +1 @@
-v1111
+v1126

lib/stripe/resources/billing_portal/session.rb

@@ -16,7 +16,7 @@ module Stripe
     # Create sessions on-demand when customers intend to manage their subscriptions
     # and billing details.
     #
-    # Learn more in the [integration guide](https://stripe.com/docs/billing/subscriptions/integrating-customer-portal).
+    # Related guide: [Customer management](https://stripe.com/customer-management)
     class Session < APIResource
       extend Stripe::APIOperations::Create
 

lib/stripe/resources/identity/verification_report.rb

@@ -13,7 +13,7 @@ module Stripe
     # API. To configure and create VerificationReports, use the
     # [VerificationSession](https://stripe.com/docs/api/identity/verification_sessions) API.
     #
-    # Related guides: [Accessing verification results](https://stripe.com/docs/identity/verification-sessions#results).
+    # Related guide: [Accessing verification results](https://stripe.com/docs/identity/verification-sessions#results).
     class VerificationReport < APIResource
       extend Stripe::APIOperations::List
 

lib/stripe/resources/payment_method_domain.rb

@@ -5,7 +5,7 @@ module Stripe
   # A payment method domain represents a web domain that you have registered with Stripe.
   # Stripe Elements use registered payment method domains to control where certain payment methods are shown.
   #
-  # Related guides: [Payment method domains](https://stripe.com/docs/payments/payment-methods/pmd-registration).
+  # Related guide: [Payment method domains](https://stripe.com/docs/payments/payment-methods/pmd-registration).
   class PaymentMethodDomain < APIResource
     extend Stripe::APIOperations::Create
     extend Stripe::APIOperations::List

lib/stripe/resources/subscription.rb

@@ -115,7 +115,7 @@ module Stripe
 
     # Updates an existing subscription to match the specified parameters.
     # When changing prices or quantities, we optionally prorate the price we charge next month to make up for any price changes.
-    # To preview how the proration is calculated, use the [upcoming invoice](https://stripe.com/docs/api/invoices/upcoming) endpoint.
+    # To preview how the proration is calculated, use the [create preview](https://stripe.com/docs/api/invoices/create_preview) endpoint.
     #
     # By default, we prorate subscription changes. For example, if a customer signs up on May 1 for a 100 price, they'll be billed 100 immediately. If on May 15 they switch to a 200 price, then on June 1 they'll be billed 250 (200 for a renewal of her subscription, plus a 50 prorating adjustment for half of the previous month's 100 difference). Similarly, a downgrade generates a credit that is applied to the next invoice. We also prorate when you make quantity changes.
     #
@@ -123,11 +123,11 @@ module Stripe
     #
     #
     # The billing interval is changed (for example, from monthly to yearly).
-    # The subscription moves from free to paid, or paid to free.
+    # The subscription moves from free to paid.
     # A trial starts or ends.
     #
     #
-    # In these cases, we apply a credit for the unused time on the previous price, immediately charge the customer using the new price, and reset the billing date.
+    # In these cases, we apply a credit for the unused time on the previous price, immediately charge the customer using the new price, and reset the billing date. Learn about how [Stripe immediately attempts payment for subscription changes](https://stripe.com/billing/subscriptions/upgrade-downgrade#immediate-payment).
     #
     # If you want to charge for an upgrade immediately, pass proration_behavior as always_invoice to create prorations, automatically invoice the customer for those proration adjustments, and attempt to collect payment. If you pass create_prorations, the prorations are created but not automatically invoiced. If you want to bill the customer for the prorations before the subscription's renewal date, you need to manually [invoice the customer](https://stripe.com/docs/api/invoices/create).
     #