Update changelog
E3S1: Various cutscene improvements and changes

 * Timing adjustments
 * Fade out before spawning things, make some of the action before the
   reveal take place under a black screen
 * Purposefully removed some shroud update sites in order to make it
   seem like Elynia is moving offscreen/dramatic effect
 * Adjusted music playlist
 * Probably some other stuff, it's quite a significant series of changes