fixed syntax error

app/main.py

@@ -209,7 +209,7 @@ async def label_image(image: str, mask_labels: MaskLabels) -> Response:
         mask_i = mask_labels.masks[i]
         mask_i = mask_i.replace("data:image/png;base64,", "")
         mask_i = Image.open(io.BytesIO(base64.b64decode(mask_i))).convert("L")
-        mask_i = mask_i.point(lambda p: 0 if <= 1 else p)
+        mask_i = mask_i.point(lambda p: 0 if p <= 1 else p)
         save_masks.append(mask_i)
     bboxes = (
         batched_mask_to_box(