[drupal-docs] updating "About Newsletter" information on list subscription page

[Charlie Lowe]

I noticed that the "About Newsletter" section of the list subscription 
page does not contain a description of the Newsletter:

http://lists.drupal.org/listinfo/newsletter

In case someone stumbles on the newletter via a vague link from another 
site, suggest we borrow from Dries's initial announcement to provide a 
little more information on that page (http://drupal.org/node/22972):

"The Drupal newsletter is a monthly publication covering the latest 
Drupal news. News tips or short articles can be submitted through the <a 
href="http://drupal.org/contact">contact form</a> or by contacting <a 
href="http://drupal.org/user/12246/contact">Robin Monks</a>.  To see the 
collection of prior postings to the list, visit the <a 
href="http://lists.drupal.org/archives/newsletter/">Newsletter 
Archives</a>."

Charlie