chore: Add Mario Karuza to humans.txt (#50710)

## What kind of change does this PR introduce?

Docs update

## What is the current behavior?

humans.txt doesn't list my name.

## What is the new behavior?

Add to humans.txt

## Additional context

Done as part of the onboarding tasks.

## Checklist

Check all before review:

- [x] I have read
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Documentation**
* Updated the public team information to include Mario Karuza. The
listed team members now reflect this addition.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Co-authored-by: mkaruza <mkaruza@users.noreply.github.com>

apps/docs/public/humans.txt

@@ -214,6 +214,7 @@ Manuel Mendez
 Manan Gupta
 Marcus Weiner
 Marija Milicevic
+Mario Karuza
 Mark Burggraf
 Márton Boros
 Matthew Hambright