22a474c README.md: fix main manifest filename

Authored and Committed by jlebon 2 years ago
1 file changed. 7 lines added. 7 lines removed.
    README.md: fix main manifest filename
    
    The README was still mentioning `fedora-atomic-docker-host.json`. I also
    did some other minor tweaks as I was reading through it (though there
    are still details that are out of date).
    
        
file modified
+7 -7