Server component docs use wrong next version (#35313)

The docs for the react server components preview refer refer to `next@latest` which doesn't work. The linked demo uses `canary` so I replaced it in the install command.

docs/advanced-features/react-18/server-components.md

@@ -7,7 +7,7 @@ Server Components allow us to render React components on the server. This is fun
 To use React Server Components, ensure you have React 18 installed:
 
 ```jsx
-npm install next@latest react@rc react-dom@rc
+npm install next@canary react@rc react-dom@rc
 ```
 
 Then, update your `next.config.js`: