Minor update: Refine XML( ) example 4

[watana2]

Polish XML( ) example 4 for better readability.

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Pull Request Overview

This PR refines the XML() function documentation example 4 by reorganizing the content for improved clarity. The changes reorder the examples to present a more logical progression from simple to complex, and update the numbering from three options to four options.

Key Changes

• Reordered examples to show JSON array first, then progressively more complex conversion approaches
• Updated option numbering from 1-3 to 1-4 to reflect all available approaches
• Clarified option descriptions to better distinguish between different conversion methods

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[v-dirichards]

@ecfan

Can you review the proposed changes?

Important: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

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