Update GitHub Actions versions

[FanwangM]

Attempt to address the failing PyPI release.

Summary by Sourcery

Update release workflow to use Python 3.12 and Sigstore action v3 to fix PyPI release failures.

Enhancements:

• Use Python 3.12 in the GitHub Actions release workflow
• Upgrade the Sigstore GitHub Action to v3

[sourcery-ai]

Reviewer's Guide

This PR updates the release workflow to use newer GitHub Action versions—specifically bumping the Python runtime and the Sigstore signing action—to resolve the PyPI publish failure.

File-Level Changes

Change	Details	Files
Bump Python version in release workflow	Updated python-version from 3.9 to 3.12 in setup-python step	.github/workflows/release.yaml
Upgrade Sigstore GitHub Action	Changed sigstore/gh-action-sigstore-python from v2.1.1 to v3	.github/workflows/release.yaml

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[deepsource-io]

Here's the code health analysis summary for commits cd68593..aa22993. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
Shell	✅ Success		View Check ↗
Python	✅ Success		View Check ↗

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[sourcery-ai]

Hey @FanwangM - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Documentation: all looks good

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[tovrstra]

There is one small thing that I believe should change.

[FanwangM]

I have updated this PR accordingly. Thanks for reviewing the codes. @tovrstra