Changelog for rgb-1.0.6-41.el9.x86_64.rpm :

* Thu Apr 08 2021 Peter Hutterer - 1.0.6-41- Fix Obsoletes line to actually obsolete the -39 server-utils (#1932754)
* Fri Mar 05 2021 Peter Hutterer 1.0.6-40- Bump Release to 40 to ensure a working update path. rgb was a separate package in xorg-x11-server-utils (not just a Provides) and took the Release from that.
* Wed Mar 03 2021 Peter Hutterer 1.0.6-1- Split rgb out from xorg-x11-server-utils into a separate package (#1934383)