use adguard dns

AdGuard offers DNS ad-blocking but they make it difficult to find the IP addresses.

They are

• 94.140.14.14
• 94.140.15.15

and for IPv6

• 2a10:50c0::ad1:ff
• 2a10:50c0::ad2:ff

These are listed at the bottom of https://adguard-dns.io/en/public-dns.html