Update README.md

[bradyclifford]

Summary of PR changes

This action is superseded by https://github.com/im-open/publish-unit-test-result-action.

Discussion

PR Requirements

• For major, minor, or breaking changes, at least one of the commit messages contains the appropriate +semver: keywords.
  • See the Incrementing the Version section of the repository's README.md for more details.
• The action code does not contain sensitive information.

NOTE: If the repo's workflow could not automatically update the README.md, it should be updated manually with the next version. For javascript actions, if the repo's workflow could not automatically recompile the action it should also be updated manually as part of the PR.

[danielle-casella-adams]

We should probably hold off on this update until we have a good transition process in place.

[danielle-casella-adams]

We evaluated the publish-unit-test-result-action action back when this PR was initially created but didn't feel it had enough benefits to warrant moving quite yet. I'm going to close this PR until we do another evaluation to determine if these should be deprecated.