enc: change the text to reference `-list` instead of the deprecated `-ciphers`
@@ -256,7 +256,7 @@ Blowfish and RC5 algorithms use a 128 bit key.
Note that some of these ciphers can be disabled at compile time
and some are available only if an appropriate engine is configured
in the configuration file. The output when invoking this command
-with the B<-ciphers> option (that is C<openssl enc -ciphers>) is
+with the B<-list> option (that is C<openssl enc -list>) is
a list of ciphers, supported by your version of OpenSSL, including
ones provided by configured engines.
