Update your email address via the Personal profile section of Workable. Click your profile icon in the upper right to access this section.
At the bottom of the personal profile you will find a section to 'Edit your credentials'. Enter your new email address here. An confirmation email will be sent to the new address. Follow the instructions in this email to complete the update (Workable will continue to use your original email address until this is done).
Updating this address will modify your login details as well as the address used for any email notifications.