Beta as update?

Today I checked through right mouse click whether there were updates and was informed a new version is available (in Dutch) . I use 20.04.040 (Dutch version) on win7 64  I downloaded it and installed it and found it is version 21.00.100

 

Strangely enough I found out this is a beta release. I also did not find an announcement of a new version release.  Guess this is some kind of mistake. Lucky I made a back up just before the install so I could go back.