[PT-BR] Translate dont block the event loop (#2685)

* copy file to pt-br folder

* finalized translation

* fix lint blanks-around-lists

* Update locale/pt-br/docs/guides/dont-block-the-event-loop.md

Co-Authored-By: Lucas Santos <lhs.santoss@gmail.com>

* fix lint - unordered-list-marker-style

* modified package-lock.json

* accepting some suggestions

* translation change on line 34

Author: maugravena