Fix a typo in SSL_CTX_set_session_ticket_cb.pod
"SSL" takes two esses, not three.
[skip ci]
@@ -177,7 +177,7 @@ L<SSL_get_session(3)>
=head1 HISTORY
-The SSL_CTX_set_session_ticket_cb(), SSSL_SESSION_set1_ticket_appdata()
+The SSL_CTX_set_session_ticket_cb(), SSL_SESSION_set1_ticket_appdata()
and SSL_SESSION_get_ticket_appdata() functions were added in OpenSSL 1.1.1.
=head1 COPYRIGHT
