test: further bump pwa wait time on CI

Author: yyx990803

packages/@vue/cli-plugin-pwa/__tests__/pwaPlugin.spec.js

@@ -59,7 +59,7 @@ test('pwa', async () => {
   browser = launched.browser
 
   // workbox plugin fetches scripts from CDN so it takes a while...
-  await new Promise(r => setTimeout(r, 2000))
+  await new Promise(r => setTimeout(r, process.env.CI ? 5000 : 2000))
   const logs = launched.logs
   expect(logs.some(msg => msg.match(/Content has been cached for offline use/))).toBe(true)
   expect(logs.some(msg => msg.match(/App is being served from cache by a service worker/))).toBe(true)