Examples 2 and 3 do not add `$cert` to Gateway

### Type of issue

Code doesn't work

### Feedback

Examples 2 and 3 indicate they show how to add the certificate to the Application Gateway, but it is not demonstrated in the code.

### Page URL

https://learn.microsoft.com/en-us/powershell/module/az.network/new-azapplicationgatewaysslcertificate?view=azps-12.0.0

### Content source URL

https://github.com/Azure/azure-powershell/blob/main/src/Network/Network/help/New-AzApplicationGatewaySslCertificate.md

### Author

@mikefrobbins

### Document Id

24f3c4bb-ea0c-b984-fdbb-c872884b9dda

Open src/Network/Network/help/New-AzApplicationGatewaySslCertificate.md and inspect Examples 2 and 3 alongside their descriptions. Confirm how the certificate variable is created and where the Application Gateway is configured. Done means the examples' code demonstrates the behavior their text promises, with the rendered documentation remaining consistent.

Written by the indexing model from the issue text.