Updates node version in code and CI

[ncordon]

Why

In the case of the code to align it with the upx project.

In the case of the CI because we are using deprecated versions for the actions that will be removed in November.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 7e0d088

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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