fix: Use Display name for campaigns (#7631)

fixes: #4299

app/views/api/v1/widget/campaigns/index.json.jbuilder

@@ -3,5 +3,5 @@ json.array! @campaigns do |campaign|
   json.trigger_rules campaign.trigger_rules
   json.trigger_only_during_business_hours campaign.trigger_only_during_business_hours
   json.message campaign.message
-  json.sender campaign.sender&.slice(:name, :avatar_url)
+  json.sender campaign.sender&.push_event_data
 end