How do I turn off email notifications for artefact updates

RedEye artefact update notifications are a way for the system to inform users that changes have been made to the engineering content you are associated with based on your user role(s). It cannot be modified or turned off.

You can however create inbox rule to redirect them to a folder or turn the notification off. See more details:

Microsoft Outlook - Set Up Rules

Create rules to filter your emails - Gmail Help