docs: add regis-samurai as a contributor

[allcontributors[bot]]

Adds @regis-samurai as a contributor for code.

This was requested by klzns in this comment

[vtex-io-ci-cd[bot]]

Hi! I'm VTEX IO CI/CD Bot and I'll be helping you to publish your app! 🤖

Please select which version do you want to release:

• [ ] Patch

• [ ] Minor

• [ ] Major

And then you just need to merge your PR when you are ready! There is no need to create a release commit/tag.

• [x] No thanks, I would rather do it manually 😞

[vtex-io-docs-bot[bot]]

Beep boop :robot:

Thank you so much for keeping our documentation up-to-date :heart: