Update origin hostname to point to aks

terraform/domains/environment_domains/config/production.tfvars.json

@@ -11,7 +11,7 @@
           "to-domain": "refer-serious-misconduct.education.gov.uk"
         }
       ],
-      "origin_hostname": "s165p01-rsm-production-app.azurewebsites.net"
+      "origin_hostname": "refer-serious-misconduct-production.teacherservices.cloud"
     }
   }
 }