Cannot set functionAppScaleLimit setting in Azure CLI for Azure Function

Question

I'm attempting to set the functionAppScaleLimit to 1 according to the documentation here:
https://learn.microsoft.com/en-us/azure/azure-functions/functions-scale#limit-scale-out

Using the az resource update --resource-type Microsoft.Web/sites -g <resource_group> -n <function_app_name>/config/web --set properties.functionAppScaleLimit=<scale_limit> command appears like it's working, but if I look at the Azure Function app settings using az resource show --ids <subscription_id> the functionAppScaleLimit is set to null. It looks like that setting is now stored in siteConfig and not properties:

How do I edit this property? If I try to replace the --set properties.functionAppScaleLimit with --set properties.siteConfig.functionAppScaleLimit the functionAppScaleLimit is still set to null