fix(payments-next): Fix update button for Link as saved method Because:
commit bb6c1d8794eb5f1ecff1b0a5507e921f18b8aab5 Author: Davey AlvarezDate: Tue Jan 6 18:20:41 2026 -0800 fix(payments-next): Fix update button for Link as saved method Because: * When the user had Link as their saved payment method, the Manage Payment Methods page would show the option to update/save their payment method even when no changes had been made This commit: * Fixes the logic that compares the selected vs default payment method states Closes #PAY-3422