Warning: The `set-output` command is deprecated and will be disabled soon

[tkrotoff]

GitHub Actions displays this warning:

The set-output command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

Related issue: https://github.com/aws-actions/configure-aws-credentials/issues/521

[tkrotoff]

Superseded by https://github.com/aws-actions/aws-cloudformation-github-deploy/issues/80