Update how-to-contribute-to-the-magento-2-community.md

[aleron75]

Hi Brent, we already sketched content for a section like this here: https://github.com/mage-os/meta/blob/main/docs/contributor-and-reviewer-guide.md

Would you like to use that text? I can do it if you don't have time; no worries.

Let me know. Alessandro