Given in the past the button only ever said Update if there was actually an update available, now it looks like there is an update when there isn't:

So I try and press the Update button, but I can't, because there isn't actually an update available, so the button is disabled and can't be pressed.

So I think something is wrong and switch from my mobile to laptop to have a closer look... and realise it's not that something is actually broken, it's just the UI has changed and there is now an constantly displayed green Update button that can't be pressed (unless there is actually an update available of course).

I think how it was previously (with a red button saying "Check for updates" and then only showing the green "Update" button when an update was available) was a lot clearer.