Updated (synced) pt_BR readme.md

[williamokano]

On the hacktoberfest I created the pt_BR of the readme.md.

Since it was updated (some few lines) just merge request is just to keep both versions synced.

[codecov-io]

Codecov Report

Merging #62 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##             master     #62   +/-   ##
========================================
  Coverage      88.7%   88.7%           
  Complexity      237     237           
========================================
  Files            18      18           
  Lines           726     726           
========================================
  Hits            644     644           
  Misses           82      82

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[AydinHassan]

Thanks!