docs: fix typo in multimodal (#1101)

docs/concepts/multimodal.md

@@ -99,7 +99,6 @@ from openai import OpenAI
 from pydantic import BaseModel
 import instructor
 from instructor.multimodal import Audio
-import base64
 
 client = instructor.from_openai(OpenAI())
 
@@ -109,20 +108,21 @@ class User(BaseModel):
  age: int
 
 
-with open("./output.wav", "rb") as f:
- encoded_string = base64.b64encode(f.read()).decode("utf-8")
-
 resp = client.chat.completions.create(
  model="gpt-4o-audio-preview",
  response_model=User,
  modalities=["text"],
  audio={"voice": "alloy", "format": "wav"},
+ messages=[
+ {
+ "role": "user",
+ "content": [
  "Extract the following information from the audio:",
  Audio.from_path("./output.wav"),
  ],
- },
+ }, # type: ignore
  ],
-) # type: ignore
+)
 
 print(resp)
 # > name='Jason' age=20