Land rapid7#8036, Fix run_as_psh with domain accounts

Missed a commit in this PR last time due to typo updating
the PR before merge.

Author: bwatters-r7

documentation/modules/post/windows/manage/run_as_psh.md

@@ -20,6 +20,8 @@ The process will use the Start-Process command of powershell to run a process as
 - Requires Powershell
 - Hidden Mode does not work with older powershell versions
 - Interactive mode needs to be run from a meterpreter console
+- Certain SYSTEM Services cannot run Start-Process with the -credential switch, causing the module to fail
+- SYSTEM processes without I/O pipes cannot use interactive mode
 
 ## Examples