Update doc/api/dns.md

Co-authored-by: Rich Trott <rtrott@gmail.com>

doc/api/dns.md

@@ -1448,7 +1448,7 @@ As a result, these functions cannot have the same negative impact on other
 processing that happens on libuv's threadpool that [`dns.lookup()`][] can have.
 
 They do not use the same set of configuration files that [`dns.lookup()`][]
-uses. For instance, _they do not use the configuration from `/etc/hosts`_.
+uses. For instance, they do not use the configuration from `/etc/hosts`.
 
 [DNS error codes]: #error-codes
 [Domain Name System (DNS)]: https://en.wikipedia.org/wiki/Domain_Name_System