Update GitHub actions to use Node.js 16.

[jovilius]

Further info:
https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/

[jovilius]

What do you think about this @mdedetrich ?

[mdedetrich]

Triggering CI, if it passes will approve

[mdedetrich]

@jovilius The test is failing, you need to run sbt githubWorkflowGenerate and then commit the files in the .github folder.

[jovilius]

@mdedetrich, I've updated both main and test code, generated and committed ci.yml in the .github folder. All tests passed locally.

[mdedetrich]

@jovilius So the scripted tests are still failing (you can try locally by doing sbt scripted), as an example look at https://github.com/sbt/sbt-github-actions/actions/runs/3878106743/jobs/6613924426

For example one scripted test is failing because there are still references to actions/checkout@v2, i.e. https://github.com/sbt/sbt-github-actions/blob/main/src/sbt-test/sbtghactions/no-clean/.github/workflows/ci.yml#L30

[jovilius]

Updated, please have a look @mdedetrich

[mdedetrich]

@jovilius Thanks looking good. Due to having problems with the windows-latest ci (which we had to disable) I will run the tests locally on my Windows desktop tomorrow and if all looks good I will merge it.

Will also add @armanbilge as a reviewer but this looks fairly safe to me

[armanbilge]

Didn't look too carefully but sbt-typelevel rolled out a similar update already.

[jovilius]

Great!