inference pipeline sparkml xgboost notebook missing

**Link to the notebook**

(https://github.com/awslabs/amazon-sagemaker-examples/blob/master/advanced_functionality/inference_pipeline_sparkml_xgboost_abalone/inference_pipeline_sparkml_xgboost_abalone.ipynb)

**Describe the bug**
The notebooks for building inference pipeline mentioned in [https://sagemaker.readthedocs.io/en/stable/overview.html#inference-pipelines](https://sagemaker.readthedocs.io/en/stable/overview.html#inference-pipelines) are not available in the example repo.

Start with advanced_functionality/inference_pipeline_sparkml_xgboost_abalone/inference_pipeline_sparkml_xgboost_abalone.ipynb and compare its availability with the inference pipelines section of the SageMaker documentation. Check how the linked example repository currently represents this notebook. Done means the referenced notebook is available in the example repository and the documentation link resolves to it.

Written by the indexing model from the issue text.