Improve description of no macaroons auth setup

[altafan]

At the very end of the Configure CLI section, it would be better to mention the daemon's env var to use to make it run without macaroons out instead of just talking about it like:

If instead, your dameon's Operator interface is not proteced by this type of authentication/authorization (meaning you exported the env var TDEX_NO_MACAROONS=true at start-up), then you need to run: