Update index.yml

Author: msmbaldwin

articles/key-vault/secrets/index.yml

@@ -11,7 +11,7 @@ metadata:
   ms.topic: landing-page
   author: msmbaldwin
   ms.author: mbaldwin
-  ms.date: 04/07/2020
+  ms.date: 02/20/2024
 
 # linkListType: architecture | concept | deploy | download | get-started | how-to-guide | learn | overview | quickstart | reference | tutorial | video | whats-new