Just got an update message. i am not on any beta channel AFAIK:
But the release note states:
Is that right?
Hm, the beta is now removed it seems…
Observed that some Time ago as well.
I guess the Team develops that Page in Draft Mode with “Beta” in it, and just forget to remove that after publishing. I would say nothing to worry about 
It is legit, showed up in my left panel with a yellow circle and a 1 in it. I just completed my upgrade to HA-OS-10.0. I did do a full backup before doing it. I have HA-Yellow. So far so good.Check all my logs.