[Board] FYI I changed Membership_Package email addresses

[Regina Obe]

Per our discussion months ago, we decided we are not going to be giving out
mailboxes to members and we would only be giving out mail address aliases on
request.

So I have changed the Potential Benefits section -
https://wiki.osgeo.org/wiki/Membership_Package#Potential_Benefits

The line that reads
"OSGeo email address (currently available when you register on osgeo.org)"

To:
"OSGeo email address alias (on request)"

Thanks,
Regina