Broken Links in the Contributing to FreeBSD Document

[Ryan England]

At https://docs.freebsd.org/en/articles/contributing/index.html#ports-contributing,
the following link is broken. There is a note that says the issue will
be fixed post BSDCan 2019.

<a class="link"
href="http://portsmon.FreeBSD.org/portsconcordanceformaintainer.py?maintainer=ports%40FreeBSD.org"
target="_top">FreeBSD
Ports Monitoring System</a>

Thank you,
Ryan England