[chirp_users] Can't install on Ubuntu 23.04

[Dan Smith]

> Is this a new install or an upgrade.?
> 
> If an upgrade you should be able to do 'pip install --upgrade /path/to/chirp-20230425.tar.gz' and it should work.
> If a new install then Dan's comment above applies.
> 
> If, by chance, you did an original install as a system-wide install using sudo then the upgrade also would require sudo.
> 
> Note that one should always be in their home directory when doing a local install as those instructions show.

I could be wrong, but I don't think the new-or-upgrade has anything to do with this. The managed flag will block even user-based installs using the system environment (which is supremely annoying, but alas).

--Dan