Updated unit timing.

Author: Rob-Barefoot

learn-pr/wwl-azure/guided-project-update-maintain-resources/5-exercise-control-storage-access.yml

@@ -10,6 +10,6 @@ metadata:
   author: wwlpublish
   ms.author: robbarefoot
   ms.topic: unit
-durationInMinutes: 3
+durationInMinutes: 12
 content: |
-  [!include[](includes/5-exercise-control-storage-access.md)]
+  [!include[](includes/5-exercise-control-storage-access.md)]