Add Nik Richers to humans.txt (#46964)

## 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?

Adds Nik Richers to humans.txt. 

## What is the current behavior?

N/A

## What is the new behavior?

N/A

## Additional context

As requested in our onboarding documentation. 


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

## Summary by CodeRabbit

* **Chores**
* Updated the team roster to include a new team member in the public
team information.

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

Co-authored-by: Nik Richers <nik@validmind.ai>

apps/docs/public/humans.txt

@@ -207,6 +207,7 @@ Nick Littman
 Nick Nowlan
 Nicola Ferraro
 Nicolas Nosenzo
+Nik Richers
 Noah Moss
 Nyannyacha
 Oli R