node@12 has been deprecated warnings

[jkremser]

The GH actions that use node12 produce these warnings in our pipeline:

Node.js 12 actions are deprecated. For more information see: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/. Please update the following actions to use Node.js 16: fkirc/skip-duplicate-actions

Also similarly set-output was deprecated and this should be used instead: https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#setting-an-environment-variable

So once/if those actions are updated to 16 or later we should also update those versions to get rid of those warnings.
Namely it's:

• actions/checkout (3.1.0 should be ok)
• fkirc/skip-duplicate-actions (master is on 16 so probably 5.2.0 should be ok)
• actions/setup-go (https://github.com/actions/setup-go/blob/main/package.json#L37 anything 3.x.x should be ok)
• docker/login-action (2.1.0 should be ok)

[kuritka]

Also found that issue in coredns-crd-plugin, created issue for that