node-executors-help: reword text about master
This screen is in the nodes view and can be reached for:
/computer/(master)/configure
To temporarily prevent any builds from being executed on an agent, use the
<i>Mark this node temporarily offline</i> button on the agent's page.
<p>
- This does not apply to the Jenkins master &mdash; setting the number of
- executors to zero will prevent any builds from being executed on the master.
+ For the master, set the number of executors to zero to prevent it from
+ executing builds locally.
</div>
