Heading for tenant-level configuration

Author: reshmabidikar

userguide/aviate/aviate-custom-invoice-sequencing.adoc

@@ -21,6 +21,8 @@ To use the custom invoice sequencing feature provided by the Aviate plugin, ensu
 com.killbill.billing.plugin.aviate.enableCustomInvoiceSequencing=true
 ----
 
+=== Tenant-level Configuration
+
 In addition, the Aviate Custom Invoicing feature requires some tenant-level configuration.  This can be done by executing the https://killbill.github.io/slate/tenant.html#add-a-per-tenant-configuration-for-a-plugin[per-tenant configuration] endpoint as follows:
 
 [source, bash]