Add Tag format placeholder to docs
Add Tag format placeholder to docs

Also fix spacing on CreatedAt table

Signed-off-by: Dan Young <5716cc40769303914dac486db0fc6ac4cba9419e@newrelic.com>

projectatomic/buildah,rhatdan/buildah,nalind/buildah-1,nalind/buildah-1,nalind/buildah,TomSweeneyRedHat/buildah,TomSweeneyRedHat/buildah,rhatdan/buildah,nalind/buildah,projectatomic/buildah,rhatdan/buildah,nalind/buildah-1,TomSweeneyRedHat/buildah,projectatomic/buildah