Ghost of Tsushima update 2.06 was released today by Sucker Punch. You can find out the complete patch notes for this update from here.
Sucker Punch has confirmed that this new update is a minor hotfix that resolves a simple issue with the game. What happened was if players who arrived at the new Iki Island while wearing the Sakai Armor would be unable to progress. If you were affected by it, the good news is that this has been resolved. The patch notes were posted by Sucker Punch.