Enable module assessment for knowledge check

Author: staleycyn

learn-pr/wwl-azure/configure-storage-accounts/8-knowledge-check.yml

@@ -14,7 +14,7 @@ metadata:
   ms.topic: unit
   ms.custom:
   - N/A
-  module_assessment: false
+  module_assessment: true
 durationInMinutes: 3
 content: |
   [!include[](includes/8-knowledge-check.md)]