A mistake in the Runner documentation

[rbohyra]

Hi Folks!
Just found a mistake in documentation page about Runners: (https://docs.semui.co/administration-guide/runners).
The installation manual contains a command to start the runner:
semaphore runner --config ./config.json,
But my view is that a proper command should be:
semaphore runner start --config=./config.json.
At least it fix my issue with running semaphore runner :)