CI: Update softprops/action-gh-release to v2.0.4

[RytoEX]

Description

The softprops/action-gh-release action is the last remaining action in this repo that was still using node16. Updating should remove the associated warnings.

Motivation and Context

Want less CI warnings so the meaningful warnings stand out.

How Has This Been Tested?

Tested on my fork with obs-plugintemplate and got CI to be green with no warnings about node16.

See:

• CI: Update softprops/action-gh-release to v2.0.4 obs-plugintemplate#118

Types of changes

• Tweak (non-breaking change to improve existing functionality)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.