[Bugfix] Migrate CreateAudio from deprecated class Config to ConfigDict (#5245)

Signed-off-by: Nick Cao <ncao@redhat.com>
Co-authored-by: Codex <noreply@openai.com>

vllm_omni/entrypoints/openai/protocol/audio.py

@@ -5,7 +5,7 @@ from dataclasses import dataclass
 from typing import Annotated, Any, Literal
 
 import numpy as np
-from pydantic import AliasChoices, BaseModel, Field, PrivateAttr, field_validator, model_validator
+from pydantic import AliasChoices, BaseModel, ConfigDict, Field, PrivateAttr, field_validator, model_validator
 
 # Bound int request fields to avoid overflow issues.
 _INT64_MIN = -(2**63)
@@ -423,6 +423,8 @@ class OpenAICreateAudioGenerateRequest(BaseModel):
 
 
 class CreateAudio(BaseModel):
+    model_config = ConfigDict(arbitrary_types_allowed=True)
+
     audio_tensor: np.ndarray
     sample_rate: int = 24000
     output_sample_rate: int | None = None
@@ -430,9 +432,6 @@ class CreateAudio(BaseModel):
     speed: float = 1.0
     base64_encode: bool = True
 
-    class Config:
-        arbitrary_types_allowed = True
-
 
 class AudioChunkMetadata(BaseModel):
     """Waveform dimensions after transforms, before encoding.