small typo/bug in the example

I think
print(azure.ai.ml.version.VERSION)

should be
print(azure.ai.ml._version.VERSION)

or at least that is what works for me

---
#### Document Details

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* ID: 2e8c5178-140e-41a7-8e42-414ce65cfea1
* Version Independent ID: 864214b2-5a41-45ac-c3e6-0dde20fee1d3
* Content: [Install the Azure Machine Learning SDK v2 for Python - Azure Machine Learning Python](https://docs.microsoft.com/en-us/python/api/overview/azure/ml/installv2?view=azure-ml-py)
* Content Source: [AzureML-Docset/docs-ref-conceptual/installv2.md](https://github.com/MicrosoftDocs/MachineLearning-Python-pr/blob/live/AzureML-Docset/docs-ref-conceptual/installv2.md)
* Service: **machine-learning**
* Sub-service: **core**
* GitHub Login: @harneetvirk
* Microsoft Alias: **harnvir**

開啟 AzureML-Docset/docs-ref-conceptual/installv2.md，並檢查 Azure Machine Learning 安裝頁面中連結的版本範例。根據可正常運作的 Python 套件驗證匯入路徑，如有需要則更新範例，並檢查轉譯後的文件是否顯示修正後的程式碼。

由索引模型根據 Issue 內容生成。