Update utils.py
Update utils.py

Explicitly set the validate_certificate parameter of the fetch() method to True to enable certificate validation.
GoogleCloudPlatformTraining/cpd200-conference-central-python,GoogleCloudPlatformTraining/cpd200-conference-central-python,GoogleCloudPlatformTraining/cpd200-conference-central-python,GoogleCloudPlatformTraining/cpd200-conference-central-python