Remove beta flag from rspack bundle setting

Author: brambrink

content/en/docs/refguide/modeling/app-explorer/app/app-settings/runtime-tab.md

@@ -27,7 +27,7 @@ This setting was introduced in [Mendix 11.9.0](/releasenotes/studio-pro/11.9/).
 
 The available options are listed below:
 
-* **Rspack (beta)**: Use Rspack to bundle the React client app as a faster, more memory-efficient bundler
+* **Rspack**: Use Rspack to bundle the React client app as a faster, more memory-efficient bundler
 * **Rollup**: Use Rollup to bundle the React client app (default)
 
 For more information about Rspack, see the [official documentation](https://www.rspack.dev/).