If you're the team owner*, you can update your credit card details through your account setting
1. After logging in, click on the user dropdown in the top-right corner of your screen and then click on 'Account settings'
2. Then click on the 'Billing' tab
3. Click on the 'Update' button 'Payment details: Your cards' section.
4. Enter your new credit card details and hit 'Update'.
That's it, you're good to go.
* Remember that only owners are able to access and edit billing information.