Update links in modules/ROOT/pages/creating-and-using-a-live-installation-image.adoc, change uses of GNOME Disk Utility to GNOME Disks
    
    This started out as a rather small link change, in case the https://getfedora.org redirect breaks eventually.

    

    This commit:

    - replaces links to https://getfedora.org/ with links to https://fedoraproject.org/

    - replaces mentions of GNOME Disk Utility with mentions of GNOME Disks