Update Set-CsAuthConfig.md

Edits made to example one and two (added -Scenario and removed hyphen from parameter) as per https://github.com/MicrosoftDocs/office-docs-powershell/issues/2306

Author: nenonix

skype/skype-ps/skype/Set-CsAuthConfig.md

@@ -38,13 +38,15 @@ It is only meant to be run at the global level (and not at the pool level), and
 
 ### Example 1
 ```powershell
-PS C:\> Set-CsAuthConfig -BlockWindowsAuthExternally
+PS C:\> Set-CsAuthConfig -Scenario BlockWindowsAuthExternally
 ```
 
 This example forces all external clients to use MA but allows NTLM or Kerberos (for clients that don't support ADAL) to work internally. If your clients do support ADAL they will use MA internally.
 
 ### Example 2
-PS C:\> Set-CsAuthConfig -BlockWindowsAuthExternallyAndModernAuthInternally
+```powershell
+PS C:\> Set-CsAuthConfig -Scenario BlockWindowsAuthExternallyAndModernAuthInternally
+```
 
 This example blocks NTLM externally and MA internally. It forces all external clients to use MA, but allows all clients to use legacy authentication methods internally (even ADAL-capable clients).