Update README.md

I have searched the internet and
I believe it was written incorrectly.
If my understanding is correct, please update it to JWT to prevent wasting other developers' time!
Thank you.

It also issued in gotrue repo
netlify/gotrue#344 (comment)

README.md

@@ -67,7 +67,7 @@ You can also [self-host](https://supabase.com/docs/guides/hosting/overview) and
 - [pg_graphql](http://github.com/supabase/pg_graphql/) a PostgreSQL extension that exposes a GraphQL API
 - [Storage](https://github.com/supabase/storage-api) provides a RESTful interface for managing Files stored in S3, using Postgres to manage permissions.
 - [postgres-meta](https://github.com/supabase/postgres-meta) is a RESTful API for managing your Postgres, allowing you to fetch tables, add roles, and run queries, etc.
-- [GoTrue](https://github.com/netlify/gotrue) is an SWT based API for managing users and issuing SWT tokens.
+- [GoTrue](https://github.com/netlify/gotrue) is an JWT based API for managing users and issuing JWT tokens.
 - [Kong](https://github.com/Kong/kong) is a cloud-native API gateway.
 
 #### Client libraries