Fix: broken link to TS email list in documentation

Mailman was updated to a newer version and the URL of the web API of
the mailing list did change. This patch fixes the URL in the
documentation.

Change-Id: Ifb71bf2712c265e9cd62b8746d3651caf04c0a77
Signed-off-by: Gyorgy Szing <Gyorgy.Szing@arm.com>
1 file changed