Update an eog needle for flatpak dialog change
    
    Again, a dialog changed a bit in the flatpak version of the app.
    For this needle, the shade of grey is slightly different. Change
    happened between Fedora-36-20220314.n.0 and 20220315.n.0.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>