Translate Contributor section to Brazilian Portuguese

[rrrutledge]

Follow the instructions in the contributing translations documentation.

List out all of the English articles in the section.

• [x] Introduction
  • [x] Machine translation in pull request
  • [x] Native speaker review and update
• [x] Becoming an InnerSource Contributor
  • [x] Machine translation in pull request
  • [x] Native speaker review and update
• [x] Contributor Ethos
  • [x] Machine translation in pull request
  • [x] Native speaker review and update
• [x] Mechanics of contributing
  • [x] Machine translation in pull request
  • [x] Native speaker review and update
• [x] Benefits of becoming an InnerSource Contributor
  • [x] Machine translation in pull request
  • [x] Native speaker review and update
• [x] Conclusion
  • [x] Machine translation in pull request
  • [x] Native speaker review and update