Fix web app parameter name in examples (#15291)

Author: ylabade

src/Websites/Websites/help/Import-AzWebAppKeyVaultCertificate.md

@@ -25,15 +25,15 @@ The **Import-AzWebAppKeyVaultCertificate** cmdlet imports an SSL certificate to
 
 ### Example 1
 ```powershell
-PS C:\> Import-AzWebAppKeyVaultCertificate -ResourceGroupName "Default-Web-WestUS" -Name "ContosoWebApp" 
+PS C:\> Import-AzWebAppKeyVaultCertificate -ResourceGroupName "Default-Web-WestUS" -WebAppName "ContosoWebApp" 
 -KeyVaultName "ContosoKeyVault" -CertName "ContosoCertname"
 ```
 
 This command imports an SSL certificate to a web app from Key Vault.
 
 ### Example 2
 ```powershell
-PS C:\> Import-AzWebAppKeyVaultCertificate -ResourceGroupName "Default-Web-WestUS" -Name "ContosoWebApp" 
+PS C:\> Import-AzWebAppKeyVaultCertificate -ResourceGroupName "Default-Web-WestUS" -WebAppName "ContosoWebApp" 
 -KeyVaultName  '/subscriptions/[sub id]/resourceGroups/[rg]/providers/Microsoft.KeyVault/vaults/[vault name]' 
 -CertName "ContosoCertname"
 ```