docs: Add fastify integration PR to Integrations table (#11297)

add fastify to integration table

Co-authored-by: hillac <[email protected]>

Author: hillac

docs/pages/getting-started/integrations.mdx

@@ -24,6 +24,7 @@ Framework and database integrations are all based on the [Auth.js Core library](
 | NextAuth.js (`next-auth`)             | [v5 (beta)](https://nextjs.authjs.dev), [v4 (maintenance mode)](https://next-auth.js.org) |
 | Astro Auth (`@auth/astro`)            | [Open PR](https://github.com/nextauthjs/next-auth/pull/9856)                              |
 | Express Auth (`@auth/express`)        | [Experimental Release](https://express.authjs.dev)                                        |
+| Fastify Auth (`@auth/fastify`)        | [Open PR](https://github.com/nextauthjs/next-auth/pull/9587)                              |
 | Nuxt Auth (`@auth/nuxt`)              | [Open PR](https://github.com/nextauthjs/next-auth/pull/10684)                             |
 | Qwik Auth (`@auth/qwik`)              | [Released](https://qwik.authjs.dev)                                                       |
 | Remix Auth (`@auth/remix`)            | [Open PR](https://github.com/nextauthjs/next-auth/pull/6767)                              |