Suppress pydantic warning for protected namespace (#98)

Tiny PR to suppress a pydantic warning at import time:

```
UserWarning: Field "model_id" in ModelConfig has conflict with protected namespace "model_".

You may be able to resolve this warning by setting `model_config['protected_namespaces'] = ()`.
  warnings.warn(
```

---------

Signed-off-by: SumanthRH <[email protected]>

Author: SumanthRH

skythought/evals/models/base.py

@@ -3,7 +3,7 @@
 from typing import Optional, Union
 
 import yaml
-from pydantic import BaseModel, Field, PrivateAttr, model_validator
+from pydantic import BaseModel, ConfigDict, Field, PrivateAttr, model_validator
 
 MODEL_CONFIG_FILE_PATH = Path(__file__).parent / "model_configs.yaml"
 # cache the configs in a global var
@@ -35,6 +35,8 @@ def read_yaml(path: str):
 
 
 class ModelConfig(BaseModel):
+    model_config = ConfigDict(protected_namespaces=())
+
     model_id: str
     name: Optional[str] = Field(default=None)
     # can be a string or a path to a file with the string