Update README.md

README.md

@@ -34,7 +34,7 @@ pip install --pre onnxruntime-genai
 
 # Please adjust the model directory (-m) accordingly
 curl https://raw.githubusercontent.com/microsoft/onnxruntime-genai/main/examples/python/model-vision.py -o model-vision.py
-python model-vision.py -m npu/qnn-int4 --use-winml
+python model-vision.py -m npu/qnn-int4 --max_length 4096 --use-winml
 ```
 
 ## Model Description