Adding new joiner Shardul Borhade in human.txt (#48675)

## 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?

update humans.txt

## What is the current behavior?

NA

## What is the new behavior?

NA

## Additional context

Part of Onboarding


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

## Summary by CodeRabbit

* **Documentation**
  * Added Shardul Borhade to the project team listing.

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

Co-authored-by: Shardul Borhade <shardulborhade@Sharduls-MacBook-Pro.local>
Co-authored-by: Ivan Vasilov <vasilov.ivan@gmail.com>

apps/docs/public/humans.txt

@@ -271,6 +271,7 @@ Shaii O
 Shane Adams
 Shane E
 Shaun Newman
+Shardul Borhade
 Shreekar Shetty
 Sreyas Udayavarman
 Stephanie Jackson (stejacks)