element-desktop from home:alveus:redsafe project

对于 openSUSE Tumbleweed，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:alveus:redsafe/openSUSE_Tumbleweed/home:alveus:redsafe.repo
zypper refresh
zypper install element-desktop