update hf token secret key

app.py

@@ -113,7 +113,7 @@ def main():
             pass
 
         def save_results(answers):
-            api_token = os.getenv("HUGGINGFACE_TOKEN")
+            api_token = os.getenv("HFTOKEN")
             if not api_token:
                 raise ValueError("Hugging Face API token not found. Please set the HF_API_TOKEN environment variable.")