For EL 9 run the following as root:
cd /etc/yum.repos.d/
wget https://download.opensuse.org/repositories/home:deneb_alpha:branches:systemsmanagement:Uyuni:Master_510bump/EL_9/home:deneb_alpha:branches:systemsmanagement:Uyuni:Master_510bump.repo
yum install uyuni-docs_en
For AlmaLinux 8 run the following as root:
cd /etc/yum.repos.d/
wget https://download.opensuse.org/repositories/home:deneb_alpha:branches:systemsmanagement:Uyuni:Master_510bump/AlmaLinux_8/home:deneb_alpha:branches:systemsmanagement:Uyuni:Master_510bump.repo
yum install uyuni-docs_en