b092799 coreos-download: fix the misleading buttons in download page

Authored and Committed by abai 3 years ago
    coreos-download: fix the misleading buttons in download page
    
    The three buttons in the download page previously linked back
    to the overview page, which caused confusion for the users:
    https://github.com/coreos/fedora-coreos-tracker/issues/493#issuecomment-634222788
    
    Instead, use only one button "View Release Notes" to link to the release notes
    and the other three buttons for stream selector for downloads.
    
    Closes: https://github.com/coreos/fedora-coreos-tracker/issues/493#issuecomment-634222788
    Signed-off-by: Allen Bai <abai@redhat.com>