adding a stub for new architecture content

Author: kalexand-rh

architecture/architecture.adoc

@@ -42,3 +42,5 @@ which will explain how monitoring, alerting, grafana, logging, and telemetry fit
 ====
 
 include::modules/telemetry-service-overview.adoc[leveloffset=+2]
+
+include::modules/architecture-new-content.adoc[leveloffset=+1]

modules/architecture-new-content.adoc

@@ -0,0 +1,10 @@
+// Module included in the following assemblies:
+//
+// * architecture/architecture.adoc
+
+[id='architecture-updates-{context}']
+= Additional architecture content
+
+//Please add additional architecture content for the 4.0 release to this file.
+//The docs team will edit the content and modularize it to fit the rest of
+//the collection.