Refactor release upload into two parts

[ann0see]

Short description of changes

CHANGELOG: Refactor Release upload to two step process
Context: Fixes an issue?

Fixes: #3373 (deploy/) issue

Does this change need documentation? What needs to be documented and how?

No

Status of this Pull Request

Ready for review

What is missing until this pull request can be merged?

Nothing. Works. The error doesn't show up on my repo.

Checklist

• I've verified that this Pull Request follows the general code principles
• I tested my code and it does what I want
• My code follows the style guide
• I waited some time after this Pull Request was opened and all GitHub checks completed without errors.
• I've filled all the content above

[softins]

Code looks ok, but I see none of the CI jobs for the PR executed the changed steps.
Would probably be good to run a temporary test release (or pre-release?) to exercise the steps.

[ann0see]

https://github.com/ann0see/jamulus/releases/tag/r0_3_10_0