If the cli has not been run in a while, it will show old update information. It's not obvious why, and this might lead to confusion. So this commit just adds a comment to clarify that out-of-date update notifier info is expected behaviour, and why.
The new resin-multibuild and docker-progress versions widen the range
of errors caught by the 'balena push' and 'balena build' commands.
Change-type: patch
Signed-off-by: Paulo Castro <paulo@balena.io>
