fix: getContext() should be sync (#222)

* fix: getContext() should be sync

* test: update assertion after demo site code change

Author: pieh

README.md

@@ -80,10 +80,10 @@ netlify serve
 ```
 ### App Engine Developer Preview usage with Angular@19
 
-If you opt into the App Engine Developer Preview accessing `Request` and `Context` objects is streamlined. Instead of custom Netlify prefixed providers, you should use the standardized injection tokens for those provided by `@angular/ssr` instead:
+If you opt into the App Engine Developer Preview accessing `Request` and `Context` objects is streamlined. Instead of custom Netlify prefixed providers, you should use the standardized injection tokens for those provided by `@angular/core` instead:
 
 ```diff
-+import { REQUEST, REQUEST_CONTEXT } from '@angular/ssr/tokens'
++import { REQUEST, REQUEST_CONTEXT } from '@angular/core'
 import type { Context } from "@netlify/edge-functions"
 
 export class FooComponent {

demo.test.mjs

@@ -9,7 +9,7 @@ test('edge function config', async () => {
     '/favicon.ico',
     '/heroes/index.html',
     '/index.csr.html',
-    '/main-UP4QHVAQ.js',
+    '/main-KVCR6MBP.js',
     '/polyfills-FFHMD2TL.js',
     '/styles-5INURTSO.css',
     '/heroes',