Thank you for bringing this question to the Community! I would be happy to assist. If you would like to update that email address within your account simply go to the Contacts tab, search for the original email address, click on the address when it shows up on the right-hand side of the page to bring up the contact profile. Once you are in the contact profile, click on the email address again, delete it and enter in the updated email address. Finally, click the blue save button. This will update that contact’s email address. Click Here for a support article that goes over this process.
Thanks again, have a great day!