incorporates feedback

docs/getting-started/data-views-in-sec.asciidoc

@@ -28,6 +28,8 @@ image::images/dataview-filter-example.gif[video showing how to filter the active
 
 This only allows you to add index patterns that match indices that currently contain data (other index patterns are unavailable). Note that any changes made are saved in the current browser window and won't persist if you open a new tab.
 
+NOTE: You cannot update the data view for the Alerts page. It always shows data from `.alerts-security.alerts-default`.
+
 [discrete]
 [[default-data-view-security]]
 == The default {data-source}