fixed typo

Author: bandersmsft

articles/cost-management-billing/costs/index.yml

@@ -10,7 +10,7 @@ metadata:
   ms.collection: collection
   author: bandersmsft
   ms.author: banders
-  ms.date: 01/24/2020
+  ms.date: 01/28/2020
 
 # linkListType: architecture | concept | deploy | download | get-started | how-to-guide | learn | overview | quickstart | reference | tutorial | whats-new
 
@@ -92,7 +92,7 @@ landingContent:
         url: https://azure.microsoft.com/blog/tag/cost-management
       - text: Feature updates
         url: https://azure.microsoft.com/updates/cost-management-features-now-available-october-2019
-      - text: Feature in development
+      - text: Features in development
         url: https://azure.microsoft.com/updates/azure-cost-management-features-in-development-october-2019