Update default ms.topic value (#810)

Author: ElizabethSamuel-MSFT

docs/docfx.json

@@ -42,7 +42,7 @@
       "ms.suite": "office",
       "ms.author": "o365devx",
       "author": "o365devx",
-      "ms.topic": "conceptual",
+      "ms.topic": "article",
       "ms.subservice": "scripts",
       "ms.service": "excel",
       "feedback_system": "OpenSource",