Support for Doh3 in Apple DNS Profiles

Nextdns lets Apple devices favor DoH3 over DoH through DNS profile edits. For example, I can configure the link as doh3.dns.nextdns.io instead of dns.nextdns.io. Because controlD supports DoH3, adding this might require little backend work and could bring more modern DNS technology. As usual, a fallback to DoH would remain available.