[Content]: Product Added event is missing "currency" as semantic property

[ntobis]

What article on segment.com/docs is affected?

https://segment.com/docs/connections/spec/ecommerce/v2/#core-ordering

What part(s) of the article would you like to see updated?

The Product Added event misses the "currency" semantic property, whereas other product events have that property.

Additional information

No response