Update supported problem deamon list
Update supported problem deamon list

When I read through the problem daemon list, the original description make me feel a little confused since it listed problem daemon config (kernel monitor) and problem daemon types (custom plugin monitor) together.  Change the way it describes to make it more clear, however didn't find clue to categorize docker-monitor, would appreciate if reviewer can point that out.
kubernetes/node-problem-detector,kubernetes/node-problem-detector