Update tutorial-machine-learning-edge-04-train-model.md

Updates related to User Story 1680937: https://mseng.visualstudio.com/TechnicalContent/_workitems/edit/1680937

Author: john-par

articles/iot-edge/tutorial-machine-learning-edge-04-train-model.md

@@ -77,7 +77,7 @@ Let's review the files you uploaded into your Azure Notebooks project. The activ
 * **01-turbofan\_regression.ipynb:** This notebook uses the Machine Learning service workspace to create and run a machine learning experiment. Broadly, the notebook does the following steps:
 
   1. Downloads data from the Azure Storage account that was generated by the device harness.
-  1. Explores and prepare data for training and the classifier ad model.
+  1. Explores and prepares the data, then uses the data to train the classifier model.
   1. Evaluate the model from the experiment using a test dataset (Test\_FD003.txt).
   1. Publishes the best classifier model to the Machine Learning service workspace.