Update concepts-extensions.md

Author: GennadNY

articles/postgresql/flexible-server/concepts-extensions.md

@@ -28,7 +28,7 @@ Using the [Azure portal](https://portal.azure.com):
 
 Using [Azure CLI](https://docs.microsoft.com/cli/azure/):
 
-   You can white-list extensions via CLI parameter set [command]( https://docs.microsoft.com/cli/azure/postgres/flexible-server/parameter?view=azure-cli-latest). 
+   You can allow-list extensions via CLI parameter set [command]( https://docs.microsoft.com/cli/azure/postgres/flexible-server/parameter?view=azure-cli-latest&preserve-view=true). 
 
    ```bash
 az postgres flexible-server parameter set --resource-group <your resource group>  --server-name <your server name> --subscription <your subscription id> --name azure.extensions --value <extension name>,<extension name>