fix(jumpstart): ignore unknown fields in HubContentDocument to handle hub schema additions (#5849)

Author: mollyheamazon

sagemaker-core/src/sagemaker/core/jumpstart/models.py

@@ -473,6 +473,8 @@ class HubContentDocument(HostingComponentsModel, TrainingComponentsModel):
     The HubContentDocument class represents the metadata for a JumpStart model.
     """
 
+    model_config = ConfigDict(validate_assignment=True, extra="ignore")
+
     ModelTypes: List[ModelTypeEnum]
     Url: str
     MinSdkVersion: Optional[str] = None