Merge pull request #4652 from segmentio/joeynmq-patch-2

Add info about $value mapping for Klaviyo's Track events

Author: rchinn1

src/connections/destinations/catalog/klaviyo/index.md

@@ -142,6 +142,8 @@ analytics.track({
 
 When you call `track` on `analytics.js`, Segment calls Klaviyo's `track` with the same parameters.
 
+If you include `properties.revenue` in a track event, Segment maps it to Klaviyo's `$value` event.
+
 > info ""
 > When you're tracking client-side, some Klaviyo events require you send an Identify call  before a Track call.