Specifically, I struck out the part that was removed, then underlined its replacement. Even with the old text, though, it was only heavy armor that had 3 upgrade points. The text for beskar'gam actually does use the errata text ("Though not powered armor, the armor has two free upgrade slots" implies that it gets the bonus normally only applied to powered armor), which points to the text in page 37 being part of an earlier draft that was missed by the editor when tidying it up for publication.