[DOCS] Adds missing `monitoring.cluster_alerts.email_notifications.em…

…ail_address` monitoring setting (#126826)

* [DOCS] Adds missing deprecated monitoring settings

* Review comments

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>

docs/settings/monitoring-settings.asciidoc

@@ -29,10 +29,13 @@ For more information, see
 [[monitoring-general-settings]]
 ==== General monitoring settings
 
+`monitoring.cluster_alerts.email_notifications.email_address` {ess-icon}::
+deprecated:[7.11.0,"In 8.2.0 and later, this setting will no longer be supported."] 
+When enabled, specifies the email address where you want to receive cluster alert notifications.
+
 `monitoring.ui.ccs.enabled`::
 Set to `true` (default) to enable {ref}/modules-cross-cluster-search.html[cross-cluster search] of your monitoring data. The {ref}/modules-remote-clusters.html#remote-cluster-settings[`remote_cluster_client`] role must exist on each node.
 
-
 `monitoring.ui.elasticsearch.hosts`::
 Specifies the location of the {es} cluster where your monitoring data is stored.
 +