docs: Merge sign-in step into create resource group section

Author: asudbring

articles/virtual-network/quickstart-create-virtual-network.md

@@ -75,12 +75,10 @@ If you're running Azure CLI locally, use Azure CLI version 2.0.31 or later.
 
 ### [Portal](#tab/portal)
 
-## Sign in to Azure
-
-Sign in to the [Azure portal](https://portal.azure.com) with your Azure account.
-
 ## Create a resource group
 
+1. Sign in to the [Azure portal](https://portal.azure.com) with your Azure account.
+
 1. In the search box at the top of the portal, enter **Resource group**. Select **Resource groups** in the search results.
 
 1. Select **+ Create**.