Update text for "Open Consultation on all proposed changes"

Community Zone IATI Standard
#1

Hello

I noticed at
http://iatistandard.org/201/upgrades/#open-consultation-on-all-proposed-changes:

If you wish to discuss an idea before submitting a proposal you may wish to consult the IATI Technical Mailing List first.

I understand that this mailing list is now closed, replaced by this forum. Therefore, it could be useful to update this guidance text.

#2

Thanks Steven, great spot - @rory_scott is working on fixing this today, as well as checking and correcting for any other references to the IATI Technical Mailing List.