Say hello to the new osboot logo!

Thanks go to ioanm for making it! Added in osbwww-img.git revision 449ddc9c3c516526e8afd915613f8c4b885c4f68, see:

https://notabug.org/osboot/osbwww-img/commit/449ddc9c3c516526e8afd915613f8c4b885c4f68