v475

• Add support for prefetch on Checkout.Session#create.payment_method_options.us_bank_account.financial_connections, Checkout.Session.payment_method_options.us_bank_account.financial_connections, FinancialConnections.Session#create, FinancialConnections.Session, Invoice#create.payment_settings.payment_method_options.us_bank_account.financial_connections, Invoice#update.payment_settings.payment_method_options.us_bank_account.financial_connections, Invoice.payment_settings.payment_method_options.us_bank_account.financial_connections, PaymentIntent#confirm.payment_method_options.us_bank_account.financial_connections, PaymentIntent#create.payment_method_options.us_bank_account.financial_connections, PaymentIntent#update.payment_method_options.us_bank_account.financial_connections, PaymentIntent.payment_method_options.us_bank_account.financial_connections, SetupIntent#confirm.payment_method_options.us_bank_account.financial_connections, SetupIntent#create.payment_method_options.us_bank_account.financial_connections, SetupIntent#update.payment_method_options.us_bank_account.financial_connections, SetupIntent.payment_method_options.us_bank_account.financial_connections, Subscription#create.payment_settings.payment_method_options.us_bank_account.financial_connections, Subscription#update.payment_settings.payment_method_options.us_bank_account.financial_connections, and Subscription.payment_settings.payment_method_options.us_bank_account.financial_connections