Update app.py

app.py

@@ -222,7 +222,7 @@ def submit(
     endpoint_url = f"https://api.endpoints.huggingface.cloud/endpoint"
     print(endpoint_url)
 
-    response = requests.post(endpoint_url, headers=headers, json=payload)
+    response = requests.post(endpoint_url, headers=headers, data=payload)
 
     if response.status_code == 400:
         return f"{response.text}. Malformed data in {payload}"