Org Mode "Contribute", "Maintenance" pages don't give repository.

[Karl Fogel <kfogel@red-bean.com>]

The "Contribute" page at 
https://orgmode.org/worg/org-contribute.html does not mention 
git://git.sv.gnu.org/emacs/org-mode.git .  Actually, now that I 
look around, the "Maintenance" page at 
https://orgmode.org/worg/org-maintenance.html doesn't mention the 
repository address either.  It does mention the word "repository" 
a few times, but never actually links to it.

These oversights would be pretty easy to fix (if there is 
agreement that they shoud be fixed), so I haven't attached a patch 
here.  It would be quick for someone who already maintains those 
pages to make the necessary changes.

The only place I see the repository is at the top of the home page 
of
https://orgmode.org/.  That's nice and prominent :-), but 
developers would probably expect to find the address on those 
other two pages as well.

Best regards,
-Karl