fix: Don't transfer sample rooms

Signed-off-by: Marcel Müller <marcel-mueller@gmx.de>

lib/Command/User/TransferOwnership.php

@@ -85,6 +85,11 @@ class TransferOwnership extends Base {
 				continue;
 			}
 
+			if ($room->getObjectType() === Room::OBJECT_TYPE_SAMPLE) {
+				// Skip sample rooms
+				continue;
+			}
+
 			if ($room->isFederatedConversation()) {
 				$federatedRooms++;
 				continue;