updated Cart Shared snippet per #1952

Author: markzegarelli

src/connections/spec/ecommerce/v2.md

@@ -2633,7 +2633,7 @@ This event supports the following semantic properties:
 
 Example:
 ```js
-analytics.track('Cart Viewed', {
+analytics.track('Cart Shared', {
   share_via: 'email',
   share_message: 'Hey, check out this item',
   recipient: '[email protected]',