Fix propType for clientOffset (#15586)

GitOrigin-RevId: e49e2fa8240e926e44fc65c8f3d7aa1b4435e29b

services/web/frontend/js/features/file-tree/components/file-tree-draggable-preview-layer.jsx

@@ -42,7 +42,10 @@ FileTreeDraggablePreviewLayer.propTypes = {
   item: PropTypes.shape({
     title: PropTypes.string.isRequired,
   }),
-  clientOffset: PropTypes.number,
+  clientOffset: PropTypes.shape({
+    x: PropTypes.number,
+    y: PropTypes.number,
+  }),
 }
 
 function DraggablePreviewItem({ title }) {