🌐 Add portuguese translation for docs/tutorial/query-params-str-validations.md

[leandrodesouzadev]

This PR translates the tutorial/query-params-str-validations and add this page to the mkdocs.yml file.

[github-actions]

📝 Docs preview for commit d8493ad at: https://615c76f6be174500a0f4c605--fastapi.netlify.app

[codecov]

Codecov Report

Merging #3965 (d8493ad) into master (864643e) will not change coverage.
The diff coverage is n/a.

❗ Current head d8493ad differs from pull request most recent head 5343bf0. Consider uploading reports for the commit 5343bf0 to get more accurate results

@@            Coverage Diff            @@
##            master     #3965   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          409       410    +1     
  Lines        10264     10281   +17     
=========================================
+ Hits         10264     10281   +17     

Impacted Files	Coverage Δ
fastapi/concurrency.py	100.00% <0.00%> (ø)
fastapi/dependencies/utils.py	100.00% <0.00%> (ø)
.../test_tutorial/test_websockets/test_tutorial002.py	100.00% <0.00%> (ø)
tests/test_fakeasync.py	100.00% <0.00%> (ø)

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[ComicShrimp]

Sugiro algumas mudanças para melhorar a leitura do texto.

[tiangolo]

Great, thanks @leandrodesouzadev! 🍪

And thanks for the reviews @ComicShrimp, @cassiobotaro, and @diogoduartec! 🚀