Correct a typo in a manual page title

doc/src/manual/ranch_app.asciidoc

@@ -23,7 +23,7 @@ Functions:
 Transports:
 
 * link:man:ranch_ssl(3)[ranch_ssl(3)] - SSL transport
-* link:man:ranch_tcp(3)[ranch_tcp(3)] - TLS transport
+* link:man:ranch_tcp(3)[ranch_tcp(3)] - TCP transport
 
 Behaviors: