Fix the code snippets

(Pdb) image.convert("RGB")
<PIL.Image.Image image mode=RGB size=1200x750 at 0x11B7D23C0>
(Pdb) image.convert("rgb")
*** ValueError: conversion from RGB to rgb not supported
(Pdb)

README.md

@@ -175,7 +175,7 @@ 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")
+image = image.convert("RGB")
 
 convs = [
     {"role": "system", "content": "You are agent that can see, talk and act."},