Rename file for consistency with Self-managed

Author: kbatuigas

modules/manage/pages/cluster-maintenance/configure-availability.adoc

@@ -0,0 +1,5 @@
+= Configure Client Connections
+:page-aliases: manage:cluster-maintenance/configure-availability.adoc
+:description: Learn about guidelines for configuring client connections in Redpanda clusters for optimal availability.
+
+include::ROOT:manage:cluster-maintenance/configure-client-connections.adoc[tag=single-source]