CI: download assests should also work when draft release (for slsa verify)

### What happened?

A draft release will lead to a fail in downloading slsa artifacts in the slsa step.

### Steps To Reproduce

Tag, release, fail if draft (on slsa job)

### What did you expect?

slsa-ver should still work, ie. download the draft artifacts

### Version

_No response_

### Optional Screenshots

_No response_

### Optional log output

```Shell

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