Update news section with Google Cloud webinar post-event info (#14816)

* Update news section with April 4 webinar video

* Use YAML data file for news; add webinar registration CTA

* Update news section with Google Cloud webinar post-event info

website/data/news.yml

@@ -1,11 +1,11 @@
 default_link_text: 'Read more'
 
 featured_post:
-  media_html: <a href="http://hashi.co/2qO6A2H" target="_blank"><img src="assets/images/news/webinar-register-585w.png" alt="Webinar Register Now" srcset="assets/images/news/webinar-register-2000w.png 2x"></a>
-  title: Controlling Your Organization With HashiCorp Terraform and Google Cloud Platform
-  body: Register for our upcoming webinar with Google Cloud on May 24th. Learn how to build your entire infrastructure across Google Cloud with one command.
-  link_url: http://hashi.co/2qO6A2H
-  link_text: Register
+  # media_html: <a href="http://hashi.co/2qO6A2H" target="_blank"><img src="assets/images/news/webinar-register-585w.png" alt="Webinar Register Now" srcset="assets/images/news/webinar-register-2000w.png 2x"></a>
+  title: 'Webinar: Controlling Your Organization With HashiCorp Terraform and Google Cloud Platform'
+  body: Watch our recent webinar with Seth Vargo and Google Cloud. Learn how to build your entire infrastructure across Google Cloud with one command.
+  link_url: https://www.youtube.com/watch?v=Ym6DtUx5REg
+  link_text: Watch Now
 
 additional_posts:
   -