misc/rubygem-rabbit: Update to 3.0.0

While here, switch rubygem-faraday0 -> rubygem-farday because it works
with faraday 1.x series. There's no reason to stay on 0.x.

PR: 254996
Reported by: meta
Approved by: maintainer timeout (tota, > almost 2 months)
Relnotes: https://rabbit-shocker.org/ja/news.html