Update 08-Script-command-job.md

[benoitfrisque]

Module: Run a training script as a command job in Azure Machine Learning

Lab/Demo: 08

Changes proposed in this pull request:

• Added "Comment the line containing pip show azure-ai-ml as this will not be compatible with the Python script."

[afelix-95]

There is no pip show azure-ai-ml command in the notebook for this lab, so it shouldn't be a problem while executing the script. Note that the notebook for this lab is Labs/08/src/Train classification model.ipynb and not Labs/08/Run script as a command job.ipynb