Mixed content error when accessing webkit.org/team.html over https

Mixed content error when accessing webkit.org/team.html over https
https://bugs.webkit.org/show_bug.cgi?id=123020

Patch by Tibor Meszaros <tmeszaros@inf.u-szeged.hu> on 2013-10-18
Reviewed by Alexey Proskuryakov.

When the webkit.org/team.html page is accessed over https most browsers report
Mixed Content error, which is caused by the fact that the contributos.json file
is accessed over a plain http connection and not https.

* team.html:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@157640 268f45cc-cd09-0410-ab3c-d52691b4dbfc