ref(tanstackstart-react): Update SDK status from alpha to beta

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: nicohrubec

packages/tanstackstart-react/README.md

@@ -4,13 +4,14 @@
   </a>
 </p>
 
-# Official Sentry SDK for TanStack Start React (Alpha)
+# Official Sentry SDK for TanStack Start React (Beta)
 
 [![npm version](https://img.shields.io/npm/v/@sentry/tanstackstart-react.svg)](https://www.npmjs.com/package/@sentry/tanstackstart-react)
 [![npm dm](https://img.shields.io/npm/dm/@sentry/tanstackstart-react.svg)](https://www.npmjs.com/package/@sentry/tanstackstart-react)
 [![npm dt](https://img.shields.io/npm/dt/@sentry/tanstackstart-react.svg)](https://www.npmjs.com/package/@sentry/tanstackstart-react)
 
-> NOTICE: This package is in alpha state and may be subject to breaking changes.
+> This SDK is currently in **BETA**. Beta features are still in progress and may have bugs. Please reach out on
+> [GitHub](https://github.com/getsentry/sentry-javascript/issues/new/choose) if you have any feedback or concerns.
 
 > See the [Official Sentry TanStack Start SDK Docs](https://docs.sentry.io/platforms/javascript/guides/tanstackstart-react/) to get started.