[Task]: Improve the MLTransform preprocessing page

[AnandInguva]

What needs to happen?

There are some details that are needed to be updated - https://beam.apache.org/documentation/ml/preprocess-data/.

Also, link the https://beam.apache.org/documentation/ml/preprocess-data/ - to https://beam.apache.org/documentation/transforms/python/elementwise/mltransform/

• Explain why MLTransform is useful in terms of training and inference. This is not clear from the docs and this is one of the important features of the MLTransform.
• Update the input types of the MLTransform.
• Update the Python versions supported.

Issue Priority

Priority: 3 (nice-to-have improvement)

Issue Components

• Component: Python SDK
• Component: Java SDK
• Component: Go SDK
• Component: Typescript SDK
• Component: IO connector
• Component: Beam YAML
• Component: Beam examples
• Component: Beam playground
• Component: Beam katas
• Component: Website
• Component: Spark Runner
• Component: Flink Runner
• Component: Samza Runner
• Component: Twister2 Runner
• Component: Hazelcast Jet Runner
• Component: Google Cloud Dataflow Runner

[github-actions]

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