Update UseFindPeopleInPeoplePicker to document site admin bypass

Clarify that SharePoint site administrators can bypass People Picker
restrictions on sites they administer when this feature is enabled.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: 2 people

sharepoint/sharepoint-ps/Microsoft.Online.SharePoint.PowerShell/Set-SPOTenant.md

@@ -5773,7 +5773,7 @@ This feature enables tenant admins to enable ODB and SPO to respect Exchange sup
 PARAMVALUE: True | False
 
 > [!NOTE]
-> When set to $true, users aren't able to share with security groups or SharePoint groups.
+> When set to $true, users aren't able to share with security groups or SharePoint groups. SharePoint site administrators can bypass the People Picker restrictions on sites they administer.
 
 ```yaml
 Type: System.Boolean