Update to Zammad 7.0.2 (#437)

Author: mgruner

zammad/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v2
 name: zammad
-version: 16.2.5
-appVersion: 7.0.1-0066
+version: 16.3.0
+appVersion: 7.0.2-0000
 description: Zammad is a web based open source helpdesk/customer support system with many features to manage customer communication via several channels like telephone, facebook, twitter, chat and e-mails.
 home: https://zammad.org
 icon: https://raw.githubusercontent.com/zammad/zammad-documentation/main/images/zammad_logo_600x520.png