feat: upgrade runner to Node 20

[aovens-quantifi]

Resolves #272

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Before the change?

The action currently runs on Node 16, leading to warnings from GitHub

After the change?

This action will now run on Node 20, GitHub's current recommended version

Pull request checklist

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)

Does this introduce a breaking change?

Please see our docs on breaking changes to help!

• Yes
• No

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[github-actions]

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[gr2m]

can you please bump the node versions in our actions were we use actions/setup-node@v4 to match the new runtime?

[olafurw]

If this is a valid PR then can it be migrated soon before the transition period.

https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/

[gr2m]

Looks good, thank you!

[octokitbot]

🎉 This PR is included in version 2.2.0 🎉

The release is available on GitHub release

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