Fix broken video on website (CacheLib OSDI) (#293)

Summary:
The existing video embed is broken ("Video unavailable This video is no longer available because the uploader has closed their YouTube account."). This updates it to the OSDI video from https://www.usenix.org/conference/osdi20/presentation/berg

Video URL: https://www.youtube.com/watch?v=JIM08lWPvNs

Pull Request resolved: #293

Reviewed By: jaesoo-fb

Differential Revision: D55098406

Pulled By: haowu14

fbshipit-source-id: ac2dd31d5a7c9f511b5c78a8c23eceba170368dd

Author: wonglkd

website/src/pages/learnmore.js

@@ -123,7 +123,7 @@ function LearnMore() {
 	</p>
 
     <p align="center">
-	<iframe width="500" height="300" src="https://www.youtube.com/embed/wp_X-Zg9WEo"
+	<iframe width="500" height="300" src="https://www.youtube.com/embed/JIM08lWPvNs"
 		frameborder="0"
 		allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen>
 	</iframe>