Fix: Image Format not accepted by OpenAI

[ASchwad]

https://stackoverflow.com/questions/78395237/query-azure-openai-with-images

OpenAI APIs require the image_url format for vision capabilities, e.g.:

{
            "type": "image_url",
            "image_url": {
                "url": f"data:image/jpeg;base64,{base64_image}"
            }
}

[vercel]

@ASchwad is attempting to deploy a commit to the LangChain Team on Vercel.

A member of the Team first needs to authorize it.