Updating code lines in example

The highlighted line numbers were for lines that didn't exist

Author: garethx

packages/homepage/content/docs/2-embedding.md

@@ -92,7 +92,7 @@ Use this code to embed:
 
 ```html
 <iframe
-  src="https://codesandbox.io/embed/new?codemirror=1&highlights=11,12,13,14"
+  src="https://codesandbox.io/embed/new?codemirror=1&highlights=6,7,8,9"
   style="width:100%; height:500px; border:0; border-radius: 4px; overflow:hidden;"
   allow="geolocation; microphone; camera; midi; vr; accelerometer; gyroscope; payment; ambient-light-sensor; encrypted-media; usb"
   sandbox="allow-modals allow-forms allow-popups allow-scripts allow-same-origin"