SageMaker/serve didn't bring the latest code for save handler

[haNa-meister]

Describe the bug
This commit is not merged in : https://github.com/aws/sagemaker-python-sdk-staging/pull/1372
Which causes the bug that can not have valid image uri in returned pysdk model object.

To reproduce
model = modelbuilder.save()
model.create(instance_type=xxx)

Expected behavior
Need to have valid image uri in returned pysdk model

Screenshots or logs

System information
A description of your system. Please provide:

• 2.199

Additional context
Add any other context about the problem here.