Update documentation about SBAsset6 filetable
Update documentation about SBAsset6 filetable

Was discussing the filetable with Kawa when I identified this portion of the documentation was inaccurate; @Kawa-oneesan brought up that the filepath is an SBON string, and not a composite of a single byte for string length and a string (which makes *sense*, honestly).
blixt/py-starbound