Add missing alias (#2123)

Author: renetapopova

modules/ROOT/pages/clustering/clustering-advanced/multi-data-center-routing.adoc

@@ -1,5 +1,6 @@
 :description: This section shows how to configure Neo4j servers so that they are topology/data center-aware. It describes the precise configuration needed to achieve a scalable multi-data center deployment.
-:page-aliases: clustering-advanced/multi-data-center/index.adoc
+:page-aliases: clustering-advanced/multi-data-center/index.adoc, clustering-advanced/multi-data-center/load-balancing.adoc, clustering-advanced/multi-data-center/configuration.adoc
+
 [role=enterprise-edition]
 [[multi-data-center-routing]]
 = Multi-data center routing