Sync with react.dev @ 3189529 (reactjs#765)

* Clarify these features are not related to Next (#6229)

Co-authored-by: Luna Wei <luwe@fb.com>

* Add React Native EU 2023 to the conferences page (#6254)

React attends this conference hosted by Callstack. It's been on the page in previous years, missed it this year.

https://www.react-native.eu/

---------

Co-authored-by: Luna <lunaleaps@gmail.com>
Co-authored-by: Luna Wei <luwe@fb.com>
Co-authored-by: Eli White <github@eli-white.com>

Author: 4 people

src/content/community/conferences.md

@@ -15,8 +15,14 @@ August 17 & 18, 2023. Salt Lake City, UT, USA
 
 [Website](https://www.reactrally.com/) - [Twitter](https://twitter.com/ReactRally) - [Instagram](https://www.instagram.com/reactrally/)
 
+### React Native EU 2023 {/*react-native-eu-2023*/}
+September 7 & 8, 2023. Wrocław, Poland
+
+[Website](https://react-native.eu) - [Twitter](https://twitter.com/react_native_eu) - [Facebook](https://www.facebook.com/reactnativeeu)
+
+
 ### React India 2023 {/*react-india-2023*/}
-Oct 5 - 7, 2023. In-person in Goa, India (hybrid event) + Oct 3 2023 - remote day
+October 5 - 7, 2023. In-person in Goa, India (hybrid event) + Oct 3 2023 - remote day
 
 [Website](https://www.reactindia.io) - [Twitter](https://twitter.com/react_india) - [Facebook](https://www.facebook.com/ReactJSIndia) - [Youtube](https://www.youtube.com/channel/UCaFbHCBkPvVv1bWs_jwYt3w)
 

src/content/reference/react/use-client.md

@@ -51,7 +51,9 @@ When a file marked `'use client'` is imported from a server component, [compatib
 ## Usage {/*usage*/}
 
 <Wip>
+This section is a work in progress. 
 
-This section is incomplete. See also the [Next.js documentation for Server Components](https://beta.nextjs.org/docs/rendering/server-and-client-components).
-
-</Wip>
+This API can be used in any framework that supports React Server Components. You may find additional documentation from them.
+* [Next.js documentation](https://nextjs.org/docs/getting-started/react-essentials)
+* More coming soon
+</Wip>

src/content/reference/react/use-server.md

@@ -49,7 +49,9 @@ Alternatively, add `'use server';` at the very top of a file to mark all exports
 ## Usage {/*usage*/}
 
 <Wip>
+This section is a work in progress. 
 
-This section is incomplete. See also the [Next.js documentation for Server Components](https://beta.nextjs.org/docs/rendering/server-and-client-components).
-
-</Wip>
+This API can be used in any framework that supports React Server Components. You may find additional documentation from them.
+* [Next.js documentation](https://nextjs.org/docs/getting-started/react-essentials)
+* More coming soon
+</Wip>