Change "New Subscriber" email notification subject line

Question:
When visitors fill out our “Contact Us” form on our home page, Wix sends an email
notification with the subject “New Subscriber”. Is there any way to change this email notification subject?

Product:
Wix Editor, Wix Studio Editor, etc.

What are you trying to achieve:
When visitors fill out our “Contact Us” form on our home page, Wix sends an email
notification with the subject “New Subscriber”. Is there any way to change this email notification subject?

What have you already tried:
Searched the forum and throughout manage.wix.com, editor.wix.com, settings, etc.