reverting changes to sentry api reference landing (#12907)

Author: codyde

docs/api/index.mdx

@@ -9,16 +9,18 @@ If you're looking for information about the API surface for Sentry's SDKs, see t
 
 ## Versioning
 
-Sentry's web API is **v0** and under development. Public endpoints, especially those marked as beta may change.
+The current version of the Sentry's web API is considered **v0**. Our public endpoints are generally stable, but beta endpoints are subject to change.
 
 ## Getting Started
 
-- [Sentry Postman Collection](https://www.postman.com/sentryio)
 - [Authentication](/api/auth/)
 - [Pagination](/api/pagination/)
 - [Permissions](/api/permissions/)
 - [Rate Limits](/api/ratelimits)
 - [Requests](/api/requests/)
+
+### Sentry API Tutorials
+
 - [Tutorial: Create a Sentry Authentication Token](/api/guides/create-auth-token/)
 - [Tutorial: Create and List Teams with the Sentry API](/api/guides/teams-tutorial/)