fix(apim): Fix docs for TLS 1.3

Author: tomkerkhove

articles/api-management/self-hosted-gateway-settings-reference.md

@@ -120,7 +120,7 @@ This guidance helps you provide the required information to define how to authen
 
 | Name  | Description | Required | Default | Availability |
 | ------------- | ------------- | ------------- | ----| ----|
-| Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Backend.Protocols.Tls13 | Indication whether or not SSL 3.0 is allowed towards the backend. Similar to [managing protocol ciphers in managed gateway](api-management-howto-manage-protocols-ciphers.md). | No | `true` | v2.0+ |
+| Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Backend.Protocols.Tls13 | Indication whether or not TLS 1.3 is allowed towards the backend. Similar to [managing protocol ciphers in managed gateway](api-management-howto-manage-protocols-ciphers.md). | No | `true` | v2.0+ |
 | Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Backend.Protocols.Tls12 | Indication whether or not TLS 1.2 is allowed towards the backend. Similar to [managing protocol ciphers in managed gateway](api-management-howto-manage-protocols-ciphers.md). | No | `true` | v2.0+ |
 | Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Backend.Protocols.Tls11 | Indication whether or not TLS 1.1 is allowed towards the backend. Similar to [managing protocol ciphers in managed gateway](api-management-howto-manage-protocols-ciphers.md). | No | `false` | v2.0+ |
 | Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Backend.Protocols.Tls10 | Indication whether or not TLS 1.0 is allowed towards the backend. Similar to [managing protocol ciphers in managed gateway](api-management-howto-manage-protocols-ciphers.md). | No | `false` | v2.0+ |