Added description for Guest users parameter

Added a description for ShowPeoplePickerSuggestionsForGuestUsers parameter

Author: get-itips

sharepoint/sharepoint-ps/sharepoint-online/Set-SPOTenant.md

@@ -1161,7 +1161,7 @@ Accept wildcard characters: False
 ```
 
 ### -ShowPeoplePickerSuggestionsForGuestUsers
-PARAMVALUE: $true | $false
+To enable the option to search for existing guest users at Tenant Level, set this parameter to $true.
 
 
 ```yaml