How to upgrade nextcloud box 10.0.1 to 10.0.3 or 11.0.2?

hello all, I have a new nextcloud box, I noticed it has 10.0.1 stable nextcloud.
I tried to use updater app to upgrade to 10.0.3 as it has been notified by the web gui, it stops giving permissions problems.

I was able to ssh into the nextcloudbox, but it’s not common to me to ssh into devices. not easy to find how too: I wrote it to remeber it.
ssh ubuntu@nextcloud.local
these guides seem to me too complicated ,maybe adding "how to run scripts and how to stop web servers may help"
a curiosity also ,which is the stable version ,10.0.3 or 11.0.2 ?? I tested a VM with 11.0.2.

what I have to do to upgrade nextcloud box??

I solved this way, installing 11.0.2 that is the stable version I suppose now.