fix: possible fix for cosign error

[fabio-nettis]

Description

This PR tries to fix an issue with cosign that only appears if the image should be released e.g when pushing to main. Interestingly we also struggle with #3 here, but there is no solution for that for now.

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules