Bump node version to 20

[hwinther-tietoevry]

Fixes deprecation warning in github

Summary of PR changes

Bump node version from 16 to 20 in github action using statement in order to fix the github deprecation warning related to node 16.

PR Requirements

• For major, minor, or breaking changes, at least one of the commit messages contains the appropriate +semver: keywords.
  • See the Incrementing the Version section of the repository's README.md for more details.
• The action code does not contain sensitive information.

NOTE: If the repo's workflow could not automatically update the README.md, it should be updated manually with the next version. For javascript actions, if the repo's workflow could not automatically recompile the action it should also be updated manually as part of the PR.

[danielle-casella-adams]

Thank you for your PR. I'm currently working on a branch that adds some tests to this action prior to updating Node 20. When I get those in place, I'll make sure to include this update. Hopefully that should happen next week.

[hwinther-tietoevry]

This has now been fixed via another PR, thank you :)

[danielle-casella-adams]

The new version that supports node 20 is v2.4.0