Update src/content/docs/en/reference/modules/astro-middleware.mdx

Co-authored-by: Sarah Rainsberger <5098874+sarah11918@users.noreply.github.com>

Author: matthewp

src/content/docs/en/reference/modules/astro-middleware.mdx

@@ -183,7 +183,9 @@ An object for storing arbitrary information from a middleware, accessible to the
 <Since v="6.0.0" />
 </p>
 
-Specifies the [IP address](https://en.wikipedia.org/wiki/IP_address) of the request. It must be provided by the adapter using the context of the possible edge function.
+The [IP address](https://en.wikipedia.org/wiki/IP_address) of the request.
+
+This must be provided by the adapter or platform from a trusted source (e.g. socket address, platform-provided header).
 
 If not provided, accessing `clientAddress` will throw an error.