test: improve dns internet test case

0.0.0.0 is more common than other special ipv4 addresses, so
it is possible that we may not get ENOTFOUND for such addresses.
Instead, this commit uses a less common address that is reserved
for documentation (RFC) use only.

PR-URL: https://github.com/nodejs/node/pull/13261


Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: James M Snell <jasnell@gmail.com>