API Updates

[pakrym-stripe]

Codegen for openapi v226.
cc @stripe/api-libraries

Changelog

• Add support for refund_payment method on resource Terminal.Reader
• Add support for new value name on enums BillingPortal.Configuration.features.customer_update.allowed_updates[], BillingPortalConfigurationCreateParams.features.customer_update.allowed_updates[], and BillingPortalConfigurationUpdateParams.features.customer_update.allowed_updates[]
• Add support for custom_fields on Checkout.Session, CheckoutSessionCreateParams, PaymentLinkCreateParams, PaymentLinkUpdateParams, and PaymentLink
• Change Subscription.trial_settings.end_behavior and Subscription.trial_settings to be required
• Add support for interac_present on TerminalReaderPresentPaymentMethodParams.testHelpers
• Change type of TerminalReaderPresentPaymentMethodParams.testHelpers.type from literal('card_present') to enum('card_present'|'interac_present')
• Add support for refund_payment on Terminal.Reader.action
• Add support for new value refund_payment on enum Terminal.Reader.action.type

[pakrym-stripe]

LGTM!