(AzureCXP) MicrosoftDocs/azure-docs#103203

Updated line 17 with below changes:

From - The default value for maximum instance count is 20 if not specified.
To - The default value for maximum instance count is 10 if not specified.

Fixes MicrosoftDocs/azure-docs#103203

Author: GitaraniSharma-MSFT

articles/application-gateway/application-gateway-autoscaling-zone-redundant.md

@@ -14,7 +14,7 @@ ms.custom: fasttrack-edit, references_regions
 
 Application Gateway and WAF can be configured to scale in two modes:
 
-- **Autoscaling** - With autoscaling enabled, the Application Gateway and WAF v2 SKUs scale out or in based on application traffic requirements. This mode offers better elasticity to your application and eliminates the need to guess the application gateway size or instance count. This mode also allows you to save cost by not requiring the gateway to run at peak-provisioned capacity for expected maximum traffic load. You must specify a minimum and optionally maximum instance count. Minimum capacity ensures that Application Gateway and WAF v2 don't fall below the minimum instance count specified, even without traffic. Each instance is roughly equivalent to 10 more reserved Capacity Units. Zero signifies no reserved capacity and is purely autoscaling in nature. You can also optionally specify a maximum instance count, which ensures that the Application Gateway doesn't scale beyond the specified number of instances. You'll only be billed for the amount of traffic served by the Gateway. The instance counts can range from 0 to 125. The default value for maximum instance count is 20 if not specified.
+- **Autoscaling** - With autoscaling enabled, the Application Gateway and WAF v2 SKUs scale out or in based on application traffic requirements. This mode offers better elasticity to your application and eliminates the need to guess the application gateway size or instance count. This mode also allows you to save cost by not requiring the gateway to run at peak-provisioned capacity for expected maximum traffic load. You must specify a minimum and optionally maximum instance count. Minimum capacity ensures that Application Gateway and WAF v2 don't fall below the minimum instance count specified, even without traffic. Each instance is roughly equivalent to 10 more reserved Capacity Units. Zero signifies no reserved capacity and is purely autoscaling in nature. You can also optionally specify a maximum instance count, which ensures that the Application Gateway doesn't scale beyond the specified number of instances. You'll only be billed for the amount of traffic served by the Gateway. The instance counts can range from 0 to 125. The default value for maximum instance count is 10 if not specified.
 - **Manual** - You can also choose Manual mode where the gateway won't autoscale. In this mode, if there's more traffic than what Application Gateway or WAF can handle, it could result in traffic loss. With manual mode, specifying instance count is mandatory. Instance count can vary from 1 to 125 instances.
 
 ## Autoscaling and High Availability