Fixing missing author on hub

Author: rothja

data-migration/index.yml

@@ -8,6 +8,8 @@ metadata:
    ms.topic: hub-page
    ms.prod: sql
    ms.technology: migration-guide
+   author: rwestMSFT
+   ms.author: randolphwest
 
 # itemType: how-to-guide | concept | deploy | download | get-started | how-to-guide | learn | overview | quickstart | reference | tutorial | video | whats-new