[Log4j] Wrong mailing list

[Mikael Ståldal]

I think this page is out of date: 
https://logging.apache.org/log4j/2.x/mail-lists.html

It still refer to the log4j-...@logging.apache.org mailing list.
I am not sure how to change that page, it seems to not be part of the 
Maven site build of the project.