Updated node 12 to node 14 in ci.yml github action

[c69-addepar]

Chore: Since node 12 will stop working in 2 days (May 18th, 2023), we need to update the github actions affected.

Also updated the image to be ubuntu-latest, as the previous one not exist on github anymore.

Ticket: WEBCORE-2057

Release Notes: None

[bantic]

I think this is supposed to reference ticket WEBCORE-2034 instead.

This change is fine, but according to https://github.blog/changelog/2023-05-04-github-actions-all-actions-will-run-on-node16-instead-of-node12/ the only thing that is affected is actions, not workflows.

So I don't think using setup-node w/ node-version: 12 will break soon.
Still worth upgrading, of course.

[c69-addepar]

1 of 2 actions (Run test) actually fails with Node16, so i will keep this at Node14.

Run yarn test:ember
yarn run v1.22.19
$ ember test
WARNING: Node v1[6](https://github.com/Addepar/ember-classy-page-object/actions/runs/5006108868/jobs/8970938172?pr=43#step:6:7).20.0 is not tested against Ember CLI on your platform. We recommend that you use the most-recent "Active LTS" version of Node.js. See https://git.io/v[7](https://github.com/Addepar/ember-classy-page-object/actions/runs/5006108868/jobs/8970938172?pr=43#step:6:8)S5n for details.
Could not start watchman
Visit https://ember-cli.com/user-guide/#watchman for more info.
Building
Browserslist: caniuse-lite is outdated. Please run:
npx browserslist@latest --update-db

Why you should do it regularly:
https://github.com/browserslist/browserslist#browsers-data-updating
node:internal/validators:249
      throw new ERR_INVALID_ARG_TYPE(name, 'Object', value);
      ^

TypeError [ERR_INVALID_ARG_TYPE]: The "options" argument must be of type object. Received an instance of Array
    at ChildProcess.target.send (node:internal/child_process:741:7)
    at Array.forEach (<anonymous>)
    at dispatchQueuedRequests (/home/runner/work/ember-classy-page-object/ember-classy-page-object/node_modules/workerpool/lib/WorkerHandler.js:174:21)
    at ChildProcess.<anonymous> (/home/runner/work/ember-classy-page-object/ember-classy-page-object/node_modules/workerpool/lib/WorkerHandler.js:129:7)
    at ChildProcess.emit (node:events:513:2[8](https://github.com/Addepar/ember-classy-page-object/actions/runs/5006108868/jobs/8970938172?pr=43#step:6:9))
    at emit (node:internal/child_process:[9](https://github.com/Addepar/ember-classy-page-object/actions/runs/5006108868/jobs/8970938172?pr=43#step:6:10)46:[14](https://github.com/Addepar/ember-classy-page-object/actions/runs/5006108868/jobs/8970938172?pr=43#step:6:15))
    at processTicksAndRejections (node:internal/process/task_queues:84:[21](https://github.com/Addepar/ember-classy-page-object/actions/runs/5006108868/jobs/8970938172?pr=43#step:6:22)) {
  code: 'ERR_INVALID_ARG_TYPE'
}
error Command failed with exit code 1.