Not all destinations support arrays as properties

Add note for each event that shows an array as a property, to tell users that not all destinations accept arrays as properties. Request from CSM, to clear up common customer confusion, here: https://segment.slack.com/archives/CALA7QMJQ/p1623769073212700

Author: jenskene

src/connections/spec/ecommerce/v2.md

@@ -4,7 +4,7 @@ title: 'Spec: V2 Ecommerce Events'
 
 Segment's e-commerce spec helps define the journey for a customer as they browse your store, click on promotions, view products, add those products to a cart, and complete a purchase.
 
-**Note:** Not all destinations support every event listed here. Refer to individual destination docs for more information on supported events and properties.
+**Note:** Not all destinations support every event listed here. Not all destinations accept arrays as properties. Refer to individual destination docs for more information on supported events and properties.
 
 ## Event Lifecycles
 
@@ -117,7 +117,9 @@ analytics.track('Products Searched', {
 
 ### Product List Viewed
 
-Fire this event when a visitor views a product list or category.
+Fire this event when a visitor views a product list or category. 
+
+**Note:** Not all destinations accept arrays as properties. Refer to individual destination docs for more information on supported events and properties.
 
 This event supports the following semantic properties:
 
@@ -240,7 +242,9 @@ analytics.track('Product List Viewed', {
 
 ### Product List Filtered
 
-Send this event when a visitor filters a product list or category.
+Send this event when a visitor filters a product list or category. 
+
+**Note:** Not all destinations accept arrays as properties. Refer to individual destination docs for more information on supported events and properties.
 
 This event supports the following semantic properties:
 
@@ -933,7 +937,9 @@ analytics.track('Product Removed', {
 
 ### Cart Viewed
 
-Fire this event when a visitor views a shopping cart.
+Fire this event when a visitor views a shopping cart. 
+
+**Note:** Not all destinations accept arrays as properties. Refer to individual destination docs for more information on supported events and properties.
 
 This event supports the following semantic properties:
 
@@ -1044,7 +1050,9 @@ analytics.track('Cart Viewed', {
 
 ### Checkout Started
 
-Fire this event whenever an order/transaction was started. Fire on the page that the customer lands on after they press the checkout button.
+Fire this event whenever an order/transaction was started. Fire on the page that the customer lands on after they press the checkout button. 
+
+**Note:** Not all destinations accept arrays as properties. Refer to individual destination docs for more information on supported events and properties.
 
 Be sure to **include all items in the cart as event properties**, with the same properties from the previous calls, like so:
 
@@ -1364,7 +1372,9 @@ You can have as many or as few steps in the checkout funnel as you'd like. Note
 
 ### Order Updated
 
-Fire this event whenever an order/transaction was updated.
+Fire this event whenever an order/transaction was updated. 
+
+**Note:** Not all destinations accept arrays as properties. Refer to individual destination docs for more information on supported events and properties.
 
 Be sure to **include all items in the cart as event properties**, with the same properties from the previous calls, like so:
 
@@ -1532,7 +1542,9 @@ The `sku` and `product_id` do not have to be different. If they are different, t
 
 ### Order Completed
 
-Fire this event whenever an order/transaction was successfully completed by the customer.
+Fire this event whenever an order/transaction was successfully completed by the customer. 
+
+**Note:** Not all destinations accept arrays as properties. Refer to individual destination docs for more information on supported events and properties.
 
 Be sure to **include all items in the cart as event properties**, with the same properties from the previous calls, like so:
 
@@ -1767,6 +1779,8 @@ analytics.track('Order Refunded', {
 
 Fire this event whenever an order/transaction was cancelled.
 
+**Note:** Not all destinations accept arrays as properties. Refer to individual destination docs for more information on supported events and properties.
+
 Be sure to **include all items in the cart as event properties**, with the same properties from the previous calls.
 
 This event supports the following semantic properties:
@@ -2562,6 +2576,8 @@ analytics.track('Product Shared', {
 
 Fire this event when a customer shares a shopping cart.
 
+**Note:** Not all destinations accept arrays as properties. Refer to individual destination docs for more information on supported events and properties.
+
 This event supports the following semantic properties:
 
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