Add ADS version note

Author: tsikiksr

pipelines/samples/simple/README.md

@@ -3,3 +3,11 @@ This is a very simple sample with 3 consecutive steps, each passes data to the n
 
 # How to use this sample:
 Open the [mlpipeline_sample-ads.ipynb](./mlpipeline_sample-ads.ipynb) notebook and run all cells.
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+<br/><br/>
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+:warning: **NOTE**: You need ADS (Accelerated Data Science) SDK version 2.8 or above to use pipelines.
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+To check ADS version in your environment, open a termial window and run the command: ```pip show oracle-ads```
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+To update ADS version in your environment, open a terminal window and run the command: ```pip install oracle-ads --upgrade```