{AzureFirewall} fixes Azure#19371 (Azure#19391)

fixes Azure#19371

The parameter description: "-Name  The resource name" is not descriptive enough and needs to be described in detail to avoid confusion. This PR addresses this issue by providing the detailed description for the -Name paramater.

Author: navba-MSFT

src/Network/Network/help/Get-AzFirewallPolicyRuleCollectionGroup.md

@@ -99,7 +99,7 @@ Accept wildcard characters: False
 ```
 
 ### -Name
-The resource name.
+The Firewall Policy Rule Collection Group resource name. For example: "DefaultNetworkRuleCollectionGroup"
 
 ```yaml
 Type: String