Update quick-create-portal.md

Azure Portal has been updated to use Premium LRS as the default OS disk storage account type, while the Premium LRS is not supported by the current VM size Standard_A1_v2. 
Reference: https://learn.microsoft.com/en-us/azure/virtual-machines/av2-series

We have to update the document to let customer use Standard LRS for OS disk storage account type. 
Otherwise, the pool resize will fail with error:

- Deployment allocation failed because V size does not support storage account type. Consider updating the VM to a size that supports storage type. (Code: Reason)

Author: SvenRandom

articles/batch/quick-create-portal.md

@@ -59,6 +59,7 @@ Next, create a pool of Windows compute nodes in your Batch account. The followin
    - **Publisher**: Select **microsoftwindowsserver**.
    - **Sku**: Select **2019-datacenter-core-smalldisk**.
 
+1. Under **OS disk storage account type**, select **Standard LRS**.
 1. Scroll down to **Node size**, and for **VM size**, select **Standard_A1_v2**.
 
 1. Under **Scale**, for **Target dedicated nodes**, enter *2*.