feat(webui-localization): update and fix pt-BR

[caioluis]

Description 📣

For reference, check the issue #181

There were a few things in the Brazilian Portuguese version that seemed unnatural for me, especially some common used terms in Software Engineering (i.e.: "variáveis de ambientes" was being written as "variáveis ambientais" which means something totally unrelated to SWE).

Probably there are few things to tweak still, I'm not perfect, nobody is. Feel free to give your opinion if you are a fellow Brazilian.

Type ✨

• [x] Bug fix
• [ ] New feature
• [ ] Breaking change
• [ ] Documentation

Tests 🛠️

Trivial changes on the copies, nothing that I see that would break. I have visually tested still, tho.

---

• [x] I have read the contributing guide, agreed and acknowledged the code of conduct. 📝