add theme song video embed to exercises intro

Made-with: Cursor

Author: kentcdodds

exercises/README.mdx

@@ -2,6 +2,11 @@
 
 <EpicVideo url="https://www.epicweb.dev/workshops/structured-data/introduction-to-structured-data/intro-to-structured-data" />
 
+<VideoEmbed
+	title="Structured Data Theme Song"
+	url="https://www.youtube.com/embed/LpSEhuJYxhg?rel=0"
+/>
+
 👨‍💼 Welcome back! In the previous workshop, you mastered primitive types. Now
 it's time to work with **structured data**—the way real applications organize
 information.