Update free-science-books-pt_BR.md

[isadoraoliv]

What does this PR do?

Add Resource(s) | Remove Resource(s) | Add info | Improve Repo

For resources

Description

Why is this valuable (or not)

How do we know it's really free?

For book lists, is it a book?

Checklist:

• [X] Not a duplicate
• [X] Included author(s) if appropriate
• [X] Lists are in alphabetical order
• [X] Needed indications added (PDF, access notes, under construction)

[eshellman]

these belong in free-programmin-books, I think