docs: adding a closing parenthesis (#11064)

Author: cyrushie

docs/pages/getting-started/migrating-to-v5.mdx

@@ -306,10 +306,10 @@ import NextAuth from "next-auth"
 // export const { auth: middleware } = NextAuth(authConfig)
 
 // 2. Wrapped middleware option
-const { auth } = NextAuth(authConfig);
+const { auth } = NextAuth(authConfig)
 export default auth(async function middleware(req: NextRequest) {
   // Your custom middleware logic goes here
-}
+})
 ```
 
 The above is just an example. **The main idea**, is to separate the part of the configuration that is edge-compatible from the rest, and only import the edge-compatible part in Middleware/Edge pages/routes. You can read more about this workaround in the [Prisma docs](/getting-started/adapters/prisma), for example.