updating readme

Author: MaximRouiller

README.md

@@ -12,6 +12,7 @@ urlFragment: retrieve-opened-issue-count-on-github-with-azure-durable-functions
 description: "Build an Azure Durable Functions that will scrape GitHub for opened issues and store them on Azure Storage."
 extensions:
   ms.author: marouill
+  ms.custom: nextgen
 ---
 
 # Retrieve opened issue count on GitHub with Azure Durable Functions