operator.md incorrectly states to set --insecure to false to revert back to regular TLS

[newton-j]

operator.md states "You can also set the argument --insecure to false and the webhook service will revert back to regular TLS". However, webhook.py uses mutual tls when self.insecure == "False".

Therefore, whilst operator.md is factually accurate because "false"!="False", it is perhaps a little bit misleading (it certainly confused me)!

My proposal is to update operator.md so that is states "You can also set the argument --insecure to True and the webhook service will revert back to regular TLS"