Update first.svgz from centos-5 distribution models.
- Previously, it was using translation markers to determine the
copyright holder printed in the image. The translation marker
expands to "The CentOS Artwork SIG" which is not the copyright
holder of CentOS distribution. This update changes the first.svgz
file to use "The CentOS Project" as copyright holder of The CentOS
Distribution, invariably.