[GTALUG] Ubuntu update 19.10 -> 20.04?

[D. Hugh Redelmeier]

I have an Ubuntu 19.10 system (I'm typing on it now).
I want to upgrade it to 20.04 (released over a week ago).

 $ sudo do-release-upgrade
 Checking for a new Ubuntu release
 No new release found.

The Ubuntu Software's GUI Software Updater also sees nothing.

A Quick look at the /etc/apt/sources.list suggests that I'm using 
ca.archive.ubuntu.com.

Does anyone know why I don't see 20.04?

Odd observation: Software Update said that there were no updates.  But as 
I typed this message, with no button pushing by me, has changed its mind 
and decided that there is now an Nvidia driver settings update.