update to describe new yaml elements (#563)

atomic_red_team/spec.yaml

@@ -143,14 +143,22 @@ atomic_tests:
   #           3. Click the '#{FOOBAR}' button - you can interpolate here too!
   #
   - name: command_prompt
+    elevation_required: true 
+    # indicates whether command must be run with admin privileges. 
+    #If the elevation_required attribute is not defined, the value is assumed to be false
+    prereq_command: | 
+    # for the "command_prompt" executor, if any command returns a non-zero exit code, the pre-requisites are not met. 
+    #For the "powershell" executor, all commands are run as a script block and the script block must return 0 for success. 
+    #You can remove the prereq_command section if there are no pre-req's   
     command: |
       SoundRecorder /FILE #{output_file} /DURATION #{duration_hms}
-
+    cleanup_command: | # you can remove the cleanup_command section if there are no cleanup commands
 
 #
 # This is the second atomic test
 #
 - name: Echo to the screen
+
   description: |
     blah blah blah
   supported_platforms: