chore: correct Middleware logic in Next.js example

apps/example-nextjs/middleware.ts

@@ -3,9 +3,14 @@ import { withAuth } from "next-auth/middleware"
 // More on how NextAuth.js middleware works: https://next-auth.js.org/configuration/nextjs#middleware
 export default withAuth({
   callbacks: {
-    authorized: ({ req, token }) =>
-      // /admin requires admin role, but /me only requires the user to be logged in.
-      req.nextUrl.pathname !== "/admin" || token?.userRole === "admin",
+    authorized({ req, token }) {
+      // `/admin` requires admin role
+      if (req.nextUrl.pathname === "/admin") {
+        return token?.userRole === "admin"
+      }
+      // `/me` only requires the user to be logged in
+      return !!token
+    },
   },
 })