Specify service connection to use for dependabot

[madmuffin1]

Hi,

I am trying to setup dependabot in our Azure environment. I do not want to use a PAT, but our Build Service only has repo Read permissions.

Is there any way to tell the Azure Devops Extension to use a specific Service Connection instead of the default one?
If this is not possible yet, would you consider this worth a PR?

Thanks,
madmuffin