[tz] Need to update Kansas City, MO

[Paul Eggert]

Kevin DeCapite wrote:
> What are the procedures for formally proposing, reviewing & accepting/rejecting such changes?

Please see the file CONTRIBUTING:

https://github.com/eggert/tz/blob/master/CONTRIBUTING

Since the Kansas City info predates our cutoff date of 1970, I suggest that you 
propose a change to the file 'backward'. One way to do that would be to use the 
program 'git send-email' to send the patch to tz at iana.org.