message: update js sdk snippet
diff: @@ -29,8 +29,8 @@ from CDN or you can override the script hosting location by specifying `url` par
  }({
  instrumentationKey: "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxx"
  });
  - window.appInsights = appInsights;
  - appInsights.trackPageView();
  +
  + window.appInsights=appInsights,appInsights.queue&&0===appInsights.queue.length&&appInsights.trackPageView();
  </script>
  ```
  [Learn more.](https://azure.microsoft.com/documentation/articles/app-insights-javascript/)
  