Adding note about rg artifacts and dependsOn

Author: DCtheGeek

articles/governance/blueprints/concepts/sequencing-order.md

@@ -4,7 +4,7 @@ description: Learn about the life-cycle that a blueprint goes through and detail
 services: blueprints
 author: DCtheGeek
 ms.author: dacoulte
-ms.date: 10/25/2018
+ms.date: 11/12/2018
 ms.topic: conceptual
 ms.service: blueprints
 manager: carmonm
@@ -50,6 +50,10 @@ The ordering is accomplished by defining a `dependsOn` property in the JSON. Onl
 resource groups) and artifact objects support this property. `dependsOn` is a string array of
 artifact names that the particular artifact needs to be created before it's created.
 
+> [!NOTE]
+> **Resource group** artifacts support the `dependsOn` property, but can't be the target of a
+> `dependsOn` by any artifact type.
+
 ### Example - blueprint with ordered resource group
 
 This example blueprint has a resource group that has defined a custom sequencing order by declaring