Action using deprecated Node 12 and set-output command

[jmartin4563]

According to our node agent runs with this action, there are two GHA deprecated features being used

1. Node@12 actions are deprecated -> https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/
2. set-output will be removed soon -> https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

You can see the GHA warnings here: https://github.com/newrelic/node-newrelic/actions/runs/3330926089

[CliftonDobrich]

@jmartin4563 I merged your PR and thanks for the contrib. newrelic/.github#32

[meiao]

GHA will retire Node12 on May 18.
https://github.blog/changelog/2023-05-04-github-actions-all-actions-will-run-on-node16-instead-of-node12/
There will be a lot of failures if this is not fixed.