Update to fix pydantic warning (#7193)
Warning:
```
site-packages/deepspeed/runtime/config_utils.py:64: PydanticDeprecatedSince211: Accessing this attribute on the instance is deprecated, and will be removed in Pydantic V3. Instead, you should access this attribute from the model class. Deprecated in Pydantic V2.11 to be removed in V3.0.
kwargs = pydantic_config.model_fields[dep_field].json_schema_extra
```
Signed-off-by: Logan Adams <loadams@microsoft.com>
