[CentOS] Why the new centos-release update?

Fri Aug 3 12:58:25 UTC 2018
Greg Bailey <gbailey at lxpro.com>

Just curious about this after seeing the following output of a typical 
"yum upgrade":

Resolving Dependencies
--> Running transaction check
---> Package centos-release.x86_64 0:7-5.1804.el7.centos.2 will be updated
---> Package centos-release.x86_64 0:7-5.1804.1.el7.centos will be an update

After downloading the 2 centos-release RPMs, the content appears 
identical.  I was assuming there'd at least be differences with yum 
definitions, GPG keys, or something like that.

Was it just to fix some naming inconsistency or something?