chore(docs): add Sean Geoghegan to humans.txt (#49802)

## 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?

Adding myself to humans.txt

## What is the current behavior?

Please link any relevant issues here.

## What is the new behavior?

Feel free to include screenshots if it includes visual changes.

## Additional context

Add any other context or screenshots.


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

## Summary by CodeRabbit

* **Documentation**
* Added Sean Geoghegan to the alphabetical team list in the project
credits.

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

apps/docs/public/humans.txt

@@ -273,6 +273,7 @@ Sana Cordeaux
 Sasi Kanumuri
 Sara Read
 Satya Rohith Gannamanedi
+Sean Geoghegan
 Sean Oliver
 Sean Romberg
 Sean Thompson