Update build-and-publish.yml

[jommeke22f]

{Please select 'base: dev' as target branch above! (you can delete this line)}

Description

Motivation and Context

How Has This Been Tested?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[yubiuser]

Why do you think this change is necessary?

[dschaper]

This would break the flow, only the environment variable declarations were changed and not where the variables were actually used:

https://github.com/pi-hole/docker-pi-hole/pull/1664/files#diff-c58efb7d239ba7eb89123ff4b9e3117bd84c382787283c3f149cf0c4620d7029L150-L169

And the secrets are actually namespaced to DOCKERHUB, there are no secrets named as proposed in this change.