[Portuguese] Update tightly coupled architecture and microservices architecture

[camilosm]

Describe your changes

Renamed and updated the following files:

tightly-coupled-architectures.md -> tightly-coupled-architecture.md
microservices.md -> microservices-architecture.md

Related issue number or link (ex: resolves #issue-number)

Resolves #3179

Checklist before opening this PR (put x in the checkboxes)

• This PR does not contain plagiarism
  • don’t copy other people’s work unless you are quoting and contributing it to them.
• I have signed off on all commits
  • signing off (ex: git commit -s) is to affirm that commits comply DCO. If you are working locally, you could add an alias to your gitconfig by running git config --global alias.ci "commit -s".

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[edsoncelio]

Hi @camilosm, thanks for your contribution!
The PR must be from the dev-pt branch to the same branch (dev-pt).
I highly recommend you look at this guide, which contains all the instructions related to the contribution workflow.

Let me know If you have any questions.

[camilosm]

Ops, my mistake! I'll close this PR and create another one with the necessary corrections.