update introductory sentence + another code snippet in Response

src/content/docs/en/guides/server-side-rendering.mdx

@@ -230,8 +230,10 @@ See more details about [`Astro.cookies` and the `AstroCookie` type](/en/referenc
 
 The example below sets a response status and status text for a product listing page when the product does not exist:
 
-```astro title="src/pages/my-product.astro" {8-9}
+```astro title="src/pages/product/[id].astro" {10,11}
 ---
+export const prerender = false; // Not needed in 'server' mode
+
 import { getProduct } from '../api';
 
 const product = await getProduct(Astro.params.id);
@@ -262,9 +264,9 @@ Astro.response.headers.set('Cache-Control', 'public, max-age=3600');
 
 #### Return a `Response` object
 
-You can also return a [Response](https://developer.mozilla.org/en-US/docs/Web/API/Response) object directly from any page using on-demand rendering. 
+You can also return a [Response](https://developer.mozilla.org/en-US/docs/Web/API/Response) object directly from any page using on-demand rendering either manually or with [`Astro.redirect`](/en/reference/api-reference/#astroredirect). 
 
-The example below returns a 404 on a dynamic page after looking up an id in the database:
+The example below looks up an ID in the database on a dynamic page and either it returns a 404 if the product does not exist, or it redirects the user to another page if the product is no longer available, or it displays the product:
 
 ```astro title="src/pages/[id].astro" {10-13, 18}
 ---