Slow operations threshold logging documentation should be clearer that the command needs to be run on every node

Link to the documentation: https://docs.couchbase.com/server/current/manage/manage-logging/manage-logging.html#adjust-threshold-slow-op-logging

Affects all versions

The mcctl command only changes the slow operation threshold on the node on which it is run. This is clarified with a note at the bottom of the page:

These settings only apply to the node where the changes are made. To change the threshold across the cluster, then all the configurations must be applied to each node.

However, it is reasonable to just read the "Setting the Threshold" and not the "Setting Threshold Defaults" in which case you would miss the note.

You also normally don't find this out until after you have a problem which means the logging is lost.

Could we please add a note in the "Setting the Threshold" section as well?