For version numbers, you're looking at a bump up to version 2015.10.5.1. It's likely that this update simply fixes some bugs and brings some performance improvements along for the ride. However, if you happen to notice anything notable that we missed, be sure to shout it out in the comments below.
Update: It looks like Outlook Mail and Calendar and Groove Music have also received similarly minor updates on Windows 10 this evening. For Mail & Calendar, you're looking at a bump to version 17.6306.42251.0. And for Groove Music, we're looking at version 3.6.1328.0.
Thanks for the tips, everyone!