Secondary drive doc: VM directory doesn't exist

[Boris Kourtoukov]

After following the instructions outlined here: https://www.qubes-os.org/doc/secondary-storage/

When I run: `qvm-start my-app-vm`
I am getting a: `ERROR: VM directory doesn't exist: /var/lib/qubes/appvms/my-app-vm`

Using up-to-date Qubes R3.2
Trying to store on an internal secondary drive that is mounted to dom0.
All the commands in the doc work as expected. Just can't find the VM.

link looks like:

```
lrwxrwxrwx 1 me qubes 10 aug 28 17:50 my-app-vm -> my-app-vm
```

[Boris Kourtoukov]

And its apparently late. Just a path issue in the link. Sorry for the spam.