Add youtube video to about (#208)

* Add `react-lite-youtube-embed` plugin

* Update dependencies

* Add "Life + Data" YouTube video

* Add styles for `youtube-embed`

* Add notification about my "Life + Data" episode

* Apply suggestion from Copilot review

Author: josh-wong

docusaurus.config.js

@@ -268,6 +268,11 @@ const config = {
             type: 'custom-NotificationBell',
             position: 'right',
             notifications: [ // Instead of deleting notifications, just comment them out so that it's easier to see the history of notifications.
+              {
+                id: 5,
+                message: 'Check out my episode on the podcast "Life + Data"📺',
+                url: 'https://www.youtube.com/watch?v=LJt8iPnxnmQ'
+              },
               {
                 id: 4,
                 message: 'New Signal sticker pack!: 1950s-60s Blue Note jazz musicians🎷',