Edits Machine Learning Overview text

[lcawl]

Summary

This PR edits the UI text in the Machine Learning Overview page:

In general, the goal is to make the text more concise.

• Remove “For more information about machine learning in the Elastic stack please see here” It seems like an unnecessary reference to the marketing page, when they must already have the product installed.
• Edit “If you have input… please feel free to submit…” to “If you have input…your experience, please submit..”.
• Change “Create your first analytics job” to “Create your first data frame analytics job”?
• Change “…and annotate it with…” description of analytics jobs so it’s clearer that this annotation is performed by the job not the user.
• Change “Machine learning makes it easy….” to something like “Anomaly detection enables you to find unusual behavior in time series data”. Remove the unnecessary “Track one metric” sentence.

Checklist

Delete any items that are not applicable to this PR.

• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support

For maintainers

• This was checked for breaking API changes and was labeled appropriately

[elasticmachine]

Pinging @elastic/ml-ui (:ml)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 0bd066f

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@elasticmachine merge upstream

[lcawl]

Closed as duplicate of #64625