Update Get-Whiteboard and Get-WhiteboardsForTenant docs to have updated output response type

[guanki-microsoft]

Update Get-Whiteboard and Get-WhiteboardsForTenant docs to have updated output response type

[learn-build-service-prod]

Learn Build status updates of commit b2a4033:

✅ Validation status: passed

File	Status	Preview URL	Details
whiteboard/whiteboard-ps/WhiteboardAdmin/Get-Whiteboard.md	✅Succeeded	View (whiteboard-ps)
whiteboard/whiteboard-ps/WhiteboardAdmin/Get-WhiteboardsForTenant.md	✅Succeeded	View (whiteboard-ps)

For more details, please refer to the build report.

[learn-build-service-prod]

Learn Build status updates of commit b2a4033:

✅ Validation status: passed

File	Status	Preview URL	Details
whiteboard/whiteboard-ps/WhiteboardAdmin/Get-Whiteboard.md	✅Succeeded	View (whiteboard-ps)
whiteboard/whiteboard-ps/WhiteboardAdmin/Get-WhiteboardsForTenant.md	✅Succeeded	View (whiteboard-ps)

For more details, please refer to the build report.

[praveer09]

Please check if there is any impact on https://learn.microsoft.com/en-us/powershell/module/whiteboardadmin/set-whiteboardowner?view=whiteboard-ps

[guanki-microsoft]

Please check if there is any impact on https://learn.microsoft.com/en-us/powershell/module/whiteboardadmin/set-whiteboardowner?view=whiteboard-ps

We have validated the change and Set-WhiteboardOwner is working as expected.

[guanki-microsoft]

#sign-off

[praveer09]

#sign-off

I am not able to add the label here.

[padmagit77]

The PR is getting stuck at 2 build checks
. I am closing the PR and reopening so that it works.

[learn-build-service-prod]

Learn Build status updates of commit 4072e39:

✅ Validation status: passed

File	Status	Preview URL	Details
whiteboard/whiteboard-ps/WhiteboardAdmin/Get-Whiteboard.md	✅Succeeded	View (whiteboard-ps)
whiteboard/whiteboard-ps/WhiteboardAdmin/Get-WhiteboardsForTenant.md	✅Succeeded	View (whiteboard-ps)

For more details, please refer to the build report.