Update GitHub Actions in pre-release workflow

[cclauss]

No description provided.

[Copilot]

Pull Request Overview

Updates GitHub Actions versions and simplifies configuration in the pre-release workflow, including modernizing action versions and streamlining conditional syntax.

• Updates GitHub Actions to newer versions (checkout@v5, setup-python@v6)
• Simplifies GitHub expression syntax by removing unnecessary double braces
• Changes Python version specification from fixed 3.9 to flexible 3.x

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