Minor adjustment in how to contribute article portuguese translation

[gabrielsanttana]

• Have you followed the contributing guidelines?
• Have you explained what your changes do, and why they add value to the Guides?

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What:

Minor adjustment in the how to contribute article portuguese translation on the Open Source Guide.

Why:

To provide a more appropriate translation for the phrase "You did it!", with a more semantic and more used alternative for this ocasion.

How:

Updated the how-to-contribute.md file.

Fixes #2023

[gabrielsanttana]

@deniseyu Done! 😃

[deniseyu]

Thank you @gabrielsanttana! 💖

[Orokyunless]

http://m0##