Man pages matching name cpan::changes::spec in section 3pm:

CPAN::Changes::Spec.3pm.en	debian 10 / libcpan-changes-perl
CPAN::Changes::Spec.3pm.en	debian 11 / libcpan-changes-perl
CPAN::Changes::Spec.3pm.en	debian 12 / libcpan-changes-perl