BFing the "stop" text.

README.md

@@ -19,7 +19,7 @@ After logging in, users will be presented with choices for their working environ
 The compute size you select largely determines the costs you will accrue while it is running.  We therefore need our users to be more conscious of the compute you are using than you would be on your own hardware. We ask users to follow these guidelines:
 
 * You will have a choice of server types. Please test your use case on the smallest server that can serve as a test, and run tests with a limited scope (e.g., number of sources, iterations, etc.). Only expand the scope and/or select a larger server when you have successfully tested the smaller case.
-* Please also note that if you start an instance, closing your browser window does not necessarily stop the instance you started.  Especially with the larger instances, *_please explicitly use the “Stop My Server” button_* (under File->Hub Control Panel)  when done. 
+* Please also note that if you start an instance, closing your browser window does not necessarily stop the instance you started.  Especially with the larger instances, **please explicitly use the “Stop My Server” button** (under File->Hub Control Panel)  when done. 
 * Any time you need to use the biggest 128-core compute instance, please reach out to the Help Desk for explicit permission _before_ starting it. This will help us to be aware of resource usage for this development system, which does not yet have fully automated resource usage guardrails. Give us a brief idea of what the science use case is and an estimate for the _total_ run time. Note that if your job (or jobs) runs significantly longer than we expect, we may contact you about terminating it. If you need to stop and restart your instance, you don’t need to get permission every time as long as you are still within the original estimated total run time. If you need more time than expected, please write to the help desk with a brief justification. Our review process is more about visibility than control, so you’ll probably be approved.
 
 The compute options: