add refunds group to the variables template

Author: artcz

deploy/templates/app/intbot.env.example

@@ -55,6 +55,7 @@ GITHUB_EM_PROJECT_ID="GITHUB_EM_PROJECT_ID"
 # Zammad
 ZAMMAD_WEBHOOK_SECRET_TOKEN="zammad-shared-secret-goes-here"
 ZAMMAD_GROUP_BILLING="zammad-billing-group-name-goes-here"
+ZAMMAD_GROUP_REFUNDS = "zammad-refunds-group-name-goes-here"
 ZAMMAD_GROUP_HELPDESK="zammad-helpdesk-group-name-goes-here"
 ZAMMAD_GROUP_VOLUNTEERS="zammad-volunteers-group-name-goes-here"
 ZAMMAD_GROUP_PROGRAMME="zammad-programme-group-name-goes-here"