Update aggregate_logging.adoc

Author: Brice Fallon-Freeman

install_config/aggregate_logging.adoc

@@ -212,7 +212,7 @@ when `openshift_logging_use_ops` is set to `true`.
 |The amount of memory to allocate to Kibana proxy.
 
 |`openshift_logging_kibana_replica_count`
-|The number of replicas to which Kibana should be scaled up.
+|The number of to which Kibana should be scaled up.
 
 |`openshift_logging_kibana_nodeselector`
 |A node selector that specifies
@@ -315,7 +315,7 @@ starting up, using this may cause a delay in ES receiving current log records.
 must be at least 512M. Possible suffixes are G,g,M,m.
 
 |`openshift_logging_es_number_of_replicas`
-|The number of replica shards per primary shard for every new index. Defaults to '0'.
+|The number of replica shards per primary shard for every new index. Defaults to '0'. A minimum of `1` is advisable for production clusters.
 
 |`openshift_logging_es_number_of_shards`
 |The number of primary shards for every new index created in ES. Defaults to '1'.