doc: fix sort in sections, lists, tables of dns.md

`dns.resolveAny()`, `dnsPromises.resolveAny()`,
`dns.setServers()`, `dnsPromises.setServers()`
were out of ABC order in some places.

PR-URL: https://github.com/nodejs/node/pull/21505


Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>