update app.py file

app.py

@@ -24,7 +24,7 @@ def segment_image(img):
     outputs = model(**img)
 
   predicted_semantic_map = processor.post_process_semantic_segmentation(
-    outputs, target_sizes=[image.size[::-1]]
+    outputs, target_sizes=[img.size[::-1]]
   )[0]
 
   fig, ax = plt.subplots(figsize=(5, 5))