Fixes final issue in CT PODs highlighted by util/find-doc-nits.pl

Fixes complaint "ct missing from SYNOPSIS".
Reviewed-by: NRich Salz <rsalz@openssl.org>
Reviewed-by: NMatt Caswell <matt@openssl.org>

doc/crypto/ct.pod

 =pod
 
+=for comment openssl_manual_section:7
+
 =head1 NAME
 
 ct - Certificate Transparency