Bug#831435: www.debian.org: Link to the patch tracker broken - will fix it

[Tim Landscheidt]

The source code is in a Git repository at
https://anonscm.debian.org/git/webwml/packages.git
(https://packages.debian.org/stretch/python-pip, "Learn more
about this site." => https://packages.debian.org/about/).
The patch is already committed
(5a638ca4744b3bb68db35a92b70c568223809afd), but it has not
been deployed yet?  Probably only the Debian Website Team
can deploy it (or confirm that is has been deployed, but it
is faulty).