pydantic cleanup

Signed-off-by: Jess Frazelle <github@jessfraz.com>

kittycad/models/onboarding.py

@@ -1,7 +1,7 @@
 import datetime
 from typing import Optional
 
-from pydantic import BaseModel
+from pydantic import BaseModel, ConfigDict
 
 
 
@@ -13,3 +13,5 @@ class Onboarding(BaseModel):
     first_call_from_text_to_cad_date: Optional[datetime.datetime] = None
 
     first_token_date: Optional[datetime.datetime] = None
+
+    model_config = ConfigDict(protected_namespaces=())