Mask ID of NextDNS DNS server

Example: https://github.com/AdguardTeam/AdguardFilters/issues/227461#issue-4110543367

Format
```
h3://dns.nextdns.io/1111aa
h3://dns.nextdns.io/1111aa/device_name
quic://device_name-1111aa.dns.nextdns.io
```

other examples
```
1111aa.dns.nextdns.io
https://dns.nextdns.io/1111aa
ip#1111aa.dns.nextdns.io
```

`1111aa` - sample ID, not sure about possible length, but 6 symbols is real.
`ip` - IPv4 or IPv6

#### Proposed solution

Replace ID by `xxxxxx` (6 x). IP part `ip#` and `device_name` can be srtipped.