New review comment by ahesford on void-packages repository

https://github.com/void-linux/void-packages/pull/33425#discussion_r726999940

Comment:
```suggestion
To use Solaar without root privileges, copy the file
    /usr/share/solaar/udev-rules.d/42-logitech-unify-permissions.rules
into the directory /etc/udev/rules.d/ and reload udev rules.
```
I don't really think we need an install message---it adds noise that most people will just ignore during installation and upgrades, the rule file is installed where upstream puts it, and we generally expect people to read the documentation of packages they install---but if it will clear up some confusion, the suggested change presents the optional rule while also providing a hint about how to use Solaar without using the rule.