README.me: update Buildah description

[vrothberg]

Use the latest description of Buildah from upstream.

Signed-off-by: Valentin Rothberg [email protected]

[container-tools-bot]

Hi @vrothberg. Thanks for your PR.

I'm waiting for a GoogleContainerTools member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[vrothberg]

We received some additional feedback after the latest update that it wasn't clear if Buildah can work with Dockerfiles or not. The new description aims at addressing the feedback. Please excuse the noise.

[dlorenc]

Thanks!