fix docs

app.py

@@ -316,13 +316,13 @@ with open("image.jpg", "rb") as f:
 response = requests.post(
     "https://your-username-sam3-api.hf.space/api/sam2_compatible",
     json={
-        "data": [{
+        "data": {
             "inputs": {
                 "image": image_b64,
                 "text_prompts": ["kitten", "toy"],
                 "confidence_threshold": 0.5
             }
-        }]
+        }
     }
 )
 
@@ -330,13 +330,13 @@ response = requests.post(
 response = requests.post(
     "https://your-username-sam3-api.hf.space/api/sam2_compatible",
     json={
-        "data": [{
+        "data": {
             "inputs": {
                 "image": image_b64,
                 "boxes": [[100, 100, 200, 200]],
                 "confidence_threshold": 0.5
             }
-        }]
+        }
     }
 )