fix: default to access_token

[MonolithProjects]

Description

This PR is fixing an issue introduced in #252 - public_gh_access_token does not fallback to access_token if the public_gh_access_token is defined but emty.

Type of change

• 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)
• This change requires a documentation update
• Small minor change not affecting the Ansible Role code (Github Actions Workflow, Documentation etc.)

How Has This Been Tested?

Molecule