Change error level when monitor detects update is running.

## User Story

Change error level when monitor detects update is running.

https://github.com/GameServerManagers/LinuxGSM/blob/master/lgsm/functions/command_monitor.sh#L42

## Basic info

* **Command:** Monitor

## Further Information

Change from error to pass as this is not an error and is expected functionality if an update is running.

## Further Reading

Provide any useful documentation or resources that might help.