Update protobuf version #204

Job	Run time
collab-check	4s
wait-for-approval	2s
detect-changes	8s
codestyle-doc-tests (sagemaker-mlops)	5m 41s
integ-tests (sagemaker-mlops)	20m 50s
codestyle-doc-tests (sagemaker-core)	22m 9s
integ-tests (sagemaker-train)	52m 12s
codestyle-doc-tests (sagemaker-serve)	6m 45s
codestyle-doc-tests (sagemaker-train)	6m 47s
unit-tests (sagemaker-serve)	42m 52s
integ-tests (sagemaker-serve)	42m 49s
unit-tests (sagemaker-core)	1h 4m 11s
unit-tests (sagemaker-mlops)	28m 11s
integ-tests (sagemaker-core)	31m 27s
unit-tests (sagemaker-train)	30m 54s
	5h 55m 2s

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