enhance console documentation for limiting state changes for customers (#105)
enhance console documentation for limiting state changes for customers (#105)

* enhance console documentation for limiting state changes for customers

This commit extends our docs by commands on "How can I restrict my customers to only change specific ticket states?".

This came up on the following community thread:
https://community.zammad.org/t/prevent-the-customer-from-changing-the-status/3164

* Updated commands to use .get

Thorsten requested these changes.

zammad/zammad-documentation,zammad/zammad-documentation