Upgrade babosa gem

What does this MR do and why?

• Gem used to for normalizing unicode in e-mail address
• last upgraded to fix a deprecation warning: !59867 (diffs)
• Version 2.0 released in August 2021: https://rubygems.org/gems/babosa/versions/2.0.0
• This will help with Ruby 3.1/3.2 upgrade. CI only runs against Ruby 3.0 currently: https://github.com/norman/babosa/blob/13b15e9c5b1e31c4250f87c1ac0cefa4f8f6d30c/.github/workflows/main.yml
• I am manually testing that this branch works with Ruby 3.1/3.2 locally

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