Migrate CreateAssetEventsBody to Pydantic v2 ConfigDict (apache#56697)

Author: choo121600

airflow-core/src/airflow/api_fastapi/core_api/datamodels/assets.py

@@ -19,7 +19,7 @@
 
 from datetime import datetime
 
-from pydantic import AliasPath, Field, NonNegativeInt, field_validator
+from pydantic import AliasPath, ConfigDict, Field, NonNegativeInt, field_validator
 
 from airflow._shared.secrets_masker import redact
 from airflow.api_fastapi.core_api.base import BaseModel, StrictBaseModel
@@ -180,7 +180,4 @@ def set_from_rest_api(cls, v: dict) -> dict:
         v["from_rest_api"] = True
         return v
 
-    class Config:
-        """Pydantic config."""
-
-        extra = "forbid"
+    model_config = ConfigDict(extra="forbid")