docs: improve OpenAI notebook

[mhamilton723]

Improving the copy on the openAi notebook

AB#1912948

[github-actions]

Hey @mhamilton723 👋!
Thank you so much for contributing to our repository 🙌.
Someone from SynapseML Team will be reviewing this pull request soon.
We appreciate your patience and contributions 💯!

[mhamilton723]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[codecov-commenter]

Codecov Report

Merging #1596 (8f6a2f9) into master (e019756) will increase coverage by 1.67%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1596      +/-   ##
==========================================
+ Coverage   81.96%   83.64%   +1.67%     
==========================================
  Files         304      305       +1     
  Lines       15768    15797      +29     
  Branches      752      752              
==========================================
+ Hits        12925    13213     +288     
+ Misses       2843     2584     -259     

Impacted Files	Coverage Δ
...ain/python/synapse/ml/explainers/ICETransformer.py	24.13% <0.00%> (ø)
...ft/azure/synapse/ml/cognitive/ComputerVision.scala	72.26% <0.00%> (+0.42%)	⬆️
...se/ml/cognitive/MultivariateAnomalyDetection.scala	87.77% <0.00%> (+0.74%)	⬆️
...azure/synapse/ml/stages/MiniBatchTransformer.scala	89.02% <0.00%> (+2.43%)	⬆️
...icrosoft/azure/synapse/ml/stages/DropColumns.scala	94.11% <0.00%> (+5.88%)	⬆️
...osoft/azure/synapse/ml/stages/UDFTransformer.scala	80.00% <0.00%> (+11.42%)	⬆️
...rc/main/python/synapse/ml/stages/UDFTransformer.py	60.60% <0.00%> (+15.15%)	⬆️
...com/microsoft/azure/synapse/ml/stages/Cacher.scala	75.00% <0.00%> (+33.33%)	⬆️
...a/com/microsoft/azure/synapse/ml/stages/udfs.scala	100.00% <0.00%> (+37.50%)	⬆️
...om/microsoft/azure/synapse/ml/stages/Explode.scala	80.00% <0.00%> (+50.00%)	⬆️
... and 10 more

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