Docker container actions and service containers only work on 'ubuntu-latest'

[dsame]

replaced "ubuntu-latest image" with "ubuntu images" in the phrase

Note: If your workflows use Docker container actions or service containers, then you must use a Linux runner:

If you are using GitHub-hosted runners, you must use the ubuntu-latest runner.

See https://docs.github.com/en/free-pro-team@latest/actions/guides/about-service-containers#about-service-containers
Pay attention the is a reused data and blue block is to be changed across the whole documentation set.

The related issue: actions/runner-images#1624

Check off the following:

• All of the tests are passing.
• I have reviewed my changes in staging.
• For content changes, I have reviewed the localization checklist
• For content changes, I have reviewed the Content style guide for GitHub Docs.

[AlenaSviridenko]

LGTM

some context: Docker-Moby recently added support of Ubuntu-20.04 so now it is correct to say that Docker container actions or service containers can be used on all Ubuntu images.

[janiceilene]

Thanks for opening a PR @dsame! I'll get this triaged for review ✨

[lucascosti]

Thanks a lot for this PR, @dsame! 🙇‍♂️

I might a slight change, and when the tests pass, I'll merge this in. 🚀

[github-actions]

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