README: Pass the --channel argument to snap refresh, not only --stable

[lorumic]

Done

On the README you can read the following:

Or refresh to ensure at least version 5.14 is installed

sudo snap refresh --stable lxd

But this doesn't work. If you are on 5.0.2, you'll get this output:

root@dear-dinosaur:~# snap refresh --stable lxd
lxd (5.0/stable) 5.0.2-838e1b2 from Canonical✓ refreshed

The latest/stable channel should be passed instead, to ensure that you refresh to at least the 5.14 version.

[webteam-app]

Demo starting at https://lxd-ui-534.demos.haus

[edlerd]

good catch, thanks for the update!

Let's remember when the LTS is released to turn this back to stable -- or I guess then we can rely on the standard snap install lxd without channel or stable.