MLP-658 | ML V1 updates

[aMahanna]

Description

Documentation updates to reflect ML V1 API Changes.

Happy to address any recommendations/feedback!

Related to:

• https://github.com/arangoml/notebook-images/pull/132
• https://github.com/arangoml/arangoml/pull/68

[arangodb-docs-automation[bot]]

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