Convert image to RGB to prevent error

The error otherwise is e.g. for RGBA images (as the one in the example) "RuntimeError: The size of tensor a (4) must match the size of tensor b (3) at non-singleton dimension 0"

README.md

@@ -149,6 +149,7 @@ model.to("cuda")
 # Inference
 url = "https://assets-c4akfrf5b4d3f4b7.z01.azurefd.net/assets/2024/04/BMDataViz_661fb89f3845e.png"
 image = Image.open(BytesIO(requests.get(url, stream=True).content))
+image = image.convert("rgb")
 
 convs = [
     {"role": "system", "content": "You are agent that can see, talk and act."},