As per the evidence found by SteamDB's creator, Pavel Djundik, it looks like Valve updated the Steam client and added the Ubisoft Connect PC client to the default package. If you have Steam installed and updated, you should already have the client included in your installation.
https://www.techspot.com/news/92433-ubisoft-games-might-coming-back-steam.html?utm_source=dlvr.it&utm_medium=blogger
https://www.techspot.com/news/92433-ubisoft-games-might-coming-back-steam.html?utm_source=dlvr.it&utm_medium=blogger