adds shaun to humans.txt (#48150)

## I have read the
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)
file.

YES

## What kind of change does this PR introduce?

Updates humans.txt to include new Supabase team member, me. 😄

## What is the current behavior?

It's missing a new team member.

## What is the new behavior?

Added me to the list!

## Additional context



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

## Summary by CodeRabbit

* **Documentation**
  * Added Shaun Newman to the team listings in the documentation.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

apps/docs/public/humans.txt

@@ -267,6 +267,7 @@ Sergio Cioban Filho
 Shaii O
 Shane Adams
 Shane E
+Shaun Newman
 Shreekar Shetty
 Sreyas Udayavarman
 Stephanie Jackson (stejacks)