Update powershell/ql/src/experimental/UsernameOrPasswordParameter.qhelp

Co-authored-by: Mathias Vorreiter Pedersen <[email protected]>

Author: chanel-y

powershell/ql/src/experimental/UsernameOrPasswordParameter.qhelp

@@ -3,7 +3,7 @@
   "qhelp.dtd">
 <qhelp>
 <overview>
-<p>To standardize command parameters, credentials should be accepted as objects of type PSCredential. Functions should not make use of username or password parameters.
+<p>To standardize command parameters, credentials should be accepted as objects of type <code>PSCredential</code>. Functions should not make use of username or password parameters.
 </p>
 
 </overview>