Update Set-SPOTenant.md

Update AllowClassicPublishingSiteCreation cmd

Author: liangzheng816

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

@@ -26,6 +26,7 @@ Set-SPOTenant
  [-AIBuilderModelSelectedSitesListOperation <SelectedSitesListOperations>]
  [-AllOrganizationSecurityGroupId <Guid>]
  [-AllowAnonymousMeetingParticipantsToAccessWhiteboards <SharingState>]
+ [-AllowClassicPublishingSiteCreation <Boolean>]
  [-AllowCommentsTextOnEmailEnabled <Boolean>]
  [-AllowDownloadingNonWebViewableFiles <Boolean>]
  [-AllowEditing <Boolean>]
@@ -2064,6 +2065,30 @@ Accept pipeline input: False
 Accept wildcard characters: False
 ```
 
+### -AllowClassicPublishingSiteCreation
+
+This parameter allows creation of classic publishing site collections (templates BLANKINTERNETCONTAINER#0, CMSPUBLISHING#0 and BLANKINTERNET#0) and enablement of publishing features in other classic site collection types.
+
+The valid values are:
+
+* False (default) - Classic publishing site collections can not be created, the publishing features can not be activated in all site collections.
+* True - Classic publishing site collections can be created and the publishing features can be activated in site collections.
+
+> [!NOTE]
+> This setting affects classic publishing sites (templates BLANKINTERNETCONTAINER#0, CMSPUBLISHING#0 and BLANKINTERNET#0) creation and all site collections for publishing feature activation.
+
+```yaml
+Type: Boolean
+Parameter Sets: (All)
+Aliases:
+Applicable: SharePoint Online
+Required: False
+Position: Named
+Default value: False
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
 ### -AllowCommentsTextOnEmailEnabled  
 
 When this parameter is true, the email notification that a user receives when is mentioned, includes the surrounding document context. Set it to false to disable this feature.