doc: fix typo in ecdhCurve, a tls property name

Addresses comment after PR #6933 merged.

https://github.com/nodejs/node/pull/6933#pullrequestreview-13318708

PR-URL: https://github.com/nodejs/node/pull/10345
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Italo A. Casas <me@italoacasas.com>

doc/api/tls.md

@@ -98,9 +98,9 @@ openssl dhparam -outform PEM -out dhparam.pem 2048
 ```
 
 If using Perfect Forward Secrecy using `ECDHE`, Diffie-Hellman parameters are
-not required and a default ECDHE curve will be used. The `ecdheCurve` property
+not required and a default ECDHE curve will be used. The `ecdhCurve` property
-can be used when creating a TLS Server to specify the name of an
+can be used when creating a TLS Server to specify the name of an alternative
-alternative curve to use.
+curve to use, see [`tls.createServer()`] for more info.
 
 ### ALPN, NPN and SNI