Document admin modern controller link helpers for Twig

[TechhDan]

Under the "Templating with Twig" part of the documentation there's mention of link helpers for Legacy Controllers. For generating links to modern controllers should we use the methods mentioned in the Symfony documentation?

<!-- Legacy link helper -->
{{ getAdminLink('LegacyControllerName') }}
<!-- Symfony link helpers -->
{{ url('registered_route_name') }
{{ path('registered_route_name', {'param': 'value'}) }}</p>