Login to Dashboard
Click Site you want to disable Auto Deploy.
Scroll down to [Generate Artifct] section and make sure [Auto Deploy Enabled] icon is displayed
Navigate to [Settings].
Check its status is Enabled.
This Auto Deploy Artifact status is Enabled.
Click the toggle switch to turns it to Disable.
Let's check Auto Deploy will not work.
Go back to Site Overview and Scroll down to Generate Artifact section
Check [Auto Deploy] icon is not shown, then click Generate
Check Artifact is manually deployed and published
Since next time, click [Deploy] button to deploy an Artifact.