Update app.py

app.py

@@ -9,7 +9,7 @@ import torch
 
 model_repo_id = "Qwen/Qwen-Image" 
 hf_token = os.getenv("HF_TOKEN_SPACES")
-if HF_TOKEN is None:
+if hf_token is None:
     raise RuntimeError(
         "HF_TOKEN_SPACES is not set in the environment. "
         "Add it in the Space settings (Variables & secrets)."