Add Brazilian Portuguese translations for `Faker::Subscription`

[murichristopher]

Motivation / Background

This Pull Request has been created to add new locale data for Brazilian Portuguese subscriptions.

Additional information

This update is based on existing English data and has been translated by native Brazilian Portuguese-speaking contributors.

Checklist

Before submitting the PR make sure the following are checked:

• [x] This Pull Request is related to one change. Changes that are unrelated should be opened in separate PRs.
• [x] Commit message has a detailed description of what changed and why. If this PR fixes a related issue include it in the commit message. Ex: [Fix #issue-number]
• [x] Tests are added or updated if you fix a bug, refactor something, or add a feature.
• [x] Tests and Rubocop are passing before submitting your proposed changes.