[ssr] Tiny docs fix (#1257)

Author: AndrewJakubowicz

packages/lit-dev-content/site/docs/v3/ssr/overview.md

@@ -27,14 +27,15 @@ A number of integrations have also been published which make Lit SSR work out-of
 - [Lit Eleventy Plugin](https://github.com/lit/lit/tree/main/packages/labs/eleventy-plugin-lit#lit-labseleventy-plugin-lit)
 - [Astro integration for Lit](https://docs.astro.build/en/guides/integrations-guide/lit/)
 - [Rocket](https://rocket.modern-web.dev/)
+- Next.js pages router with [@lit-labs/nextjs](https://www.npmjs.com/package/@lit-labs/nextjs)
+- Nuxt 3 with [nuxt-ssr-lit](https://www.npmjs.com/package/nuxt-ssr-lit)
 - ...and more under development!
 
 ## Library status
 
 This library is under active development with some notable limitations we hope to resolve:
 
-- Async component work is not supported. See issues [#3219](https://github.com/lit/lit/issues/3219), [#2469](https://github.com/lit/lit/issues/2469).
+- Async component work is not supported. See issue [#2469](https://github.com/lit/lit/issues/2469).
 - Only Lit components using shadow DOM is supported. See issue [#3080](https://github.com/lit/lit/issues/3080).
-- Integration with other SSR frameworks are being worked on. See issues for [NextJS](https://github.com/lit/lit/issues/2391) and [Nuxt](https://github.com/lit/lit/issues/3049).
 - Declarative shadow DOM is not implemented in all major browsers yet, though a polyfill is available. Read more about it in [client usage](/docs/v3/ssr/client-usage#lit-components).
 - There are also open discussions that need to happen regarding `ElementRendererRegistry` for interop with other custom elements.

packages/lit-dev-content/site/docs/v3/ssr/server-usage.md

@@ -192,6 +192,7 @@ app.use(async (ctx) => {
 ```js
 // server.js
 import {ModuleLoader} from '@lit-labs/ssr/lib/module-loader.js';
+import {RenderResultReadable} from '@lit-labs/ssr/lib/render-result-readable.js';
 
 // ...
 
@@ -205,7 +206,7 @@ app.use(async (ctx) => {
   const {renderTemplate} = importResult.module.namespace;
   const ssrResult = await renderTemplate({some: "data"});
   ctx.type = 'text/html';
-  ctx.body = Readable.from(ssrResult);
+  ctx.body = new RenderResultReadable(ssrResult);
 });
 ```