Change logs for ubuntu-wallpapers source package in Yangtze V1.0

ubuntu-wallpapers (20.04.2-ok2) yangtze; urgency=medium

  * update version info

 -- luzhiping <email address hidden>  Mon, 22 Aug 2022 14:26:07 +0800

ubuntu-wallpapers (20.04.2-ok1) yangtze; urgency=medium

  * Build for openKylin.

 -- openKylinBot <email address hidden>  Mon, 25 Apr 2022 22:03:04 +0800