doc: sort bottom-of-file dns markdown links

PR-URL: #14992
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

doc/api/dns.md

@@ -644,10 +644,12 @@ They do not use the same set of configuration files than what [`dns.lookup()`][]
 uses. For instance, _they do not use the configuration from `/etc/hosts`_.
 
 [`Error`]: errors.html#errors_class_error
+[`dns.getServers()`]: #dns_dns_getservers
 [`dns.lookup()`]: #dns_dns_lookup_hostname_options_callback
 [`dns.resolve()`]: #dns_dns_resolve_hostname_rrtype_callback
 [`dns.resolve4()`]: #dns_dns_resolve4_hostname_options_callback
 [`dns.resolve6()`]: #dns_dns_resolve6_hostname_options_callback
+[`dns.resolveAny()`]: #dns_dns_resolveany_hostname_callback
 [`dns.resolveCname()`]: #dns_dns_resolvecname_hostname_callback
 [`dns.resolveMx()`]: #dns_dns_resolvemx_hostname_callback
 [`dns.resolveNaptr()`]: #dns_dns_resolvenaptr_hostname_callback
@@ -656,13 +658,11 @@ uses. For instance, _they do not use the configuration from `/etc/hosts`_.
 [`dns.resolveSoa()`]: #dns_dns_resolvesoa_hostname_callback
 [`dns.resolveSrv()`]: #dns_dns_resolvesrv_hostname_callback
 [`dns.resolveTxt()`]: #dns_dns_resolvetxt_hostname_callback
-[`dns.resolveAny()`]: #dns_dns_resolveany_hostname_callback
-[`dns.getServers()`]: #dns_dns_getservers
-[`dns.setServers()`]: #dns_dns_setservers_servers
 [`dns.reverse()`]: #dns_dns_reverse_ip_callback
+[`dns.setServers()`]: #dns_dns_setservers_servers
+[`util.promisify()`]: util.html#util_util_promisify_original
 [DNS error codes]: #dns_error_codes
 [Implementation considerations section]: #dns_implementation_considerations
+[rfc5952]: https://tools.ietf.org/html/rfc5952#section-6
 [supported `getaddrinfo` flags]: #dns_supported_getaddrinfo_flags
 [the official libuv documentation]: http://docs.libuv.org/en/latest/threadpool.html
-[`util.promisify()`]: util.html#util_util_promisify_original
-[rfc5952]: https://tools.ietf.org/html/rfc5952#section-6