lxqt: add more space.
    
    I added a tiny bit of space, but turns out theres not quit enough for
    the initramfs to be generated and the compose still fails.
    
    So, lets add 100MB. That should be enough for the scriptlets to
    complete.
    
    I'd like to cherry pick this into f40 as well.
    
    Signed-off-by: Kevin Fenzi <kevin@scrye.com>