Error in Article 'Analyze Results of a Hyperparameter Tuning job'[Content Improvement]

**Link to the notebook**
https://github.com/aws/amazon-sagemaker-examples/blob/master/hyperparameter_tuning/analyze_results/HPO_Analyze_TuningJob_Results.ipynb

**What aspects of the notebook can be improved?**
2nd code cell failed

**What are your suggestions?**
replace last lines wtih:

```
is_minimize = (
tuning_job_result['HyperParameterTuningJobConfig']['HyperParameterTuningJobObjective']['Type'] != "Maximize"
)
objective_name = tuning_job_result['HyperParameterTuningJobConfig']['HyperParameterTuningJobObjective']["MetricName"]
```